| Name | Locality | Local Authority | Administrative area |
| Is Terfyn | St. Asaph | Sir Ddinbych / Denbighshire | Sir Ddinbych / Denbighshire |
| Is Y Bryn | Newchurch and Merthyr | Sir Gaerfyrddin / Carmarthenshire | Sir Gaerfyrddin / Carmarthenshire |
| Is Y Coed | Maerdy | Rhondda Cynon Taf / Rhondda Cynon Taf | Rhondda Cynon Taf / Rhondda Cynon Taf |
| Is Y Coed | Mold | Sir y Fflint / Flintshire | Sir Y Fflint / Flintshire |
| Is-fryn | Rhymney | Caerffili / Caerphilly | Caerffili / Caerphilly |
| Is-y-bryniau | Cwmllynfell | Castell-nedd Port Talbot / Neath Port Talbot | Castell-nedd Port Talbot / Neath Port Talbot |
| Is-y-coed | Wenvoe | Bro Morgannwg / the Vale of Glamorgan | Bro Morgannwg / The Vale of Glamorgan |
| Is-y-llan | Llanddarog | Sir Gaerfyrddin / Carmarthenshire | Sir Gaerfyrddin / Carmarthenshire |
| Isa Street | Ramsbottom | Bury District (B) | Bury District (B) |
| Isaac Close | Otterton | East Devon District | Devon County |
| Isaac Close | Ordsall | Salford District (B) | Salford District (B) |
| Isaac Grove | Shiphay | Torbay (B) | Torbay (B) |
| Isaac Newton Road | Barkham | Wokingham (B) | Wokingham (B) |
| Isaac Newton Way | Londonthorpe and Harrowby without | South Kesteven District | Lincolnshire County |
| Isaac Square | Great Baddow | Chelmsford District (B) | Essex County |
| Isaac Street | Halliwell | Bolton District (B) | Bolton District (B) |
| Isaac Street | Dingle | Liverpool District (B) | Liverpool District (B) |
| Isaac Street | University | Bradford District (B) | Bradford District (B) |
| Isaac Walk | St. John | Worcester District (B) | Worcestershire County |
| Isaac Walton Place | Wednesbury South | Sandwell District (B) | Sandwell District (B) |
| Isaac Way | Pembroke Dock | Sir Benfro / Pembrokeshire | Sir Benfro / Pembrokeshire |
| Isaac's Hill | Croft Baker | North East Lincolnshire (B) | North East Lincolnshire (B) |
| Isaac's Lane | Cuckfield | Mid Sussex District | West Sussex County |
| Isaac's Lane | Haywards Heath | Mid Sussex District | West Sussex County |
| Isaac's Lane | Stapleford | Broxtowe District (B) | Nottinghamshire County |
| Isaac's Lane | Haywards Heath | Mid Sussex District | West Sussex County |
| Isaac's Lane | Burgess Hill | Mid Sussex District | West Sussex County |
| Isaac's Lane | Cuckfield Rural | Mid Sussex District | West Sussex County |
| Isaac's Lane | Cuckfield | Mid Sussex District | West Sussex County |
| Isaac's Place | Aberavon | Castell-nedd Port Talbot / Neath Port Talbot | Castell-nedd Port Talbot / Neath Port Talbot |
| Isaac's Road | Lichfield and Cobholm | Great Yarmouth District (B) | Norfolk County |
| Isaacs Close | Street | Mendip District | Somerset County |
| Isaacs Close | Bourne Valley | Poole (B) | Poole (B) |
| Isaacs Road | Shiphay | Torbay (B) | Torbay (B) |
| Isaacs Way | Droitwich Spa | Wychavon District | Worcestershire County |
| Isaacson Drive | Walton | Milton Keynes (B) | Milton Keynes (B) |
| Isaacson Road | Burwell | East Cambridgeshire District | Cambridgeshire County |
| Isabel Close | Rye Park | Broxbourne District (B) | Hertfordshire County |
| Isabel Close | Seaford | Lewes District | East Sussex County |
| Isabel Close | Highfields | Stafford District (B) | Staffordshire County |
| Isabel Crescent | Nevill | The City of Brighton and Hove (B) | The City of Brighton and Hove (B) |
| Isabel Gate | Wormley & Turnford | Broxbourne District (B) | Hertfordshire County |
| Isabel Grove | Tuebrook | Liverpool District (B) | Liverpool District (B) |
| Isabel Hill Close | Hampton | Richmond upon Thames London Boro | Greater London Authority |
| Isabel Lane | Kibworth Beauchamp | Harborough District | Leicestershire County |
| Isabel Street | Vassall | Lambeth London Boro | Greater London Authority |
| Isabella Close | West City | Newcastle upon Tyne District (B) | Newcastle Upon Tyne District (B) |
| Isabella Close | Talbot | Trafford District (B) | Trafford District (B) |
| Isabella Close | Southgate | Enfield London Boro | Greater London Authority |
| Isabella Close | Gaywood South | King's Lynn and West Norfolk District (B) | Norfolk County |
| Isabella Court | Saltney | Sir y Fflint / Flintshire | Sir Y Fflint / Flintshire |
| Isabella Drive | Farnborough and Crofton | Bromley London Boro | Greater London Authority |
| Isabella Gardens | Hamilton Centre / Ferniegair | South Lanarkshire | South Lanarkshire |
| Isabella Mews | De Beauvoir | Hackney London Boro | Greater London Authority |
| Isabella Place | Ham, Petersham and Richmond Riverside | Richmond upon Thames London Boro | Greater London Authority |
| Isabella Place | Tudor | Kingston upon Thames London Boro | Greater London Authority |
| Isabella Place | Angmering | Arun District | West Sussex County |
| Isabella Place | Scone | Perth and Kinross | Perth and Kinross |
| Isabella Road | Sturton Grange | Leeds District (B) | Leeds District (B) |
| Isabella Road | Chatham | Hackney London Boro | Greater London Authority |
| Isabella Road | Workington | Allerdale District (B) | Cumbria County |
| Isabella Road | Tiverton | Mid Devon District | Devon County |
| Isabella Road | Isabella | Northumberland | Northumberland |
| Isabella Street | Healey | Rochdale District (B) | Rochdale District (B) |
| Isabella Street | Longridge | Ribble Valley District (B) | Lancashire County |
| Isabella Street | Park | City of Nottingham (B) | City of Nottingham (B) |
| Isabella Walk | Newburn | Newcastle upon Tyne District (B) | Newcastle Upon Tyne District (B) |
| Isabelle Close | Goffs Oak | Broxbourne District (B) | Hertfordshire County |
| Isacombe Oaks | Callington | Cornwall | Cornwall |
| Isaf Road | Risca | Caerffili / Caerphilly | Caerffili / Caerphilly |
| Isaiah Street | St. Pauls | Oldham District (B) | Oldham District (B) |
| Isallt Road | Llysfaen | Conwy / Conwy | Conwy / Conwy |
| Isallt Road | Llanddulas and Rhyd-y-Foel | Conwy / Conwy | Conwy / Conwy |
| Isambard Brunel Road | Charles Dickens | City of Portsmouth (B) | City of Portsmouth (B) |
| Isambard Court | St. Marychurch | Torbay (B) | Torbay (B) |
| Isambard Drive | Longford | Coventry District (B) | Coventry District (B) |
| Isambard Mews | Blackwall and Cubitt Town | Tower Hamlets London Boro | Greater London Authority |
| Isambard Parade | St. David's | Exeter District (B) | Devon County |
| Isambard Place | Rotherhithe | Southwark London Boro | Greater London Authority |
| Isambard Way | Blunsdon St. Andrew | Swindon (B) | Swindon (B) |
| Isandula Road | Radford | City of Nottingham (B) | City of Nottingham (B) |
| Isbell Gardens | Pettits | Havering London Boro | Greater London Authority |
| Isbells Drive | Meadvale and St. John's | Reigate and Banstead District (B) | Surrey County |
| Isbets Dale | Taverham | Broadland District | Norfolk County |
| Isbister Road | Shapinsay and Kirkwall Harbour | Orkney Islands | Orkney Islands |
| Isbourne Crescent | Evesham | Wychavon District | Worcestershire County |
| Isbourne Road | Oakley | Cheltenham District (B) | Gloucestershire County |
| Isbourne Road | St. Andrew's | Colchester District (B) | Essex County |
| Isbourne Way | Winchcombe | Tewkesbury District (B) | Gloucestershire County |
| Isbourne Way | Nechells | Birmingham District (B) | Birmingham District (B) |
| Isbury Road | Marlborough | Wiltshire | Wiltshire |
| Isca Close | Ross-on-Wye | County of Herefordshire | County of Herefordshire |
| Isca Close | Cwmbran Central | Tor-faen / Torfaen | Tor-faen / Torfaen |
| Isca Road | Alphington | Exeter District (B) | Devon County |
| Isca Road | Exmouth | East Devon District | Devon County |
| Isca Road | Caerleon | Casnewydd / Newport | Casnewydd / Newport |
| Isca Street | Bradford | Manchester District (B) | Manchester District (B) |
| Iscennen Road | Ammanford | Sir Gaerfyrddin / Carmarthenshire | Sir Gaerfyrddin / Carmarthenshire |
| Iscoed | Llanelli Rural | Sir Gaerfyrddin / Carmarthenshire | Sir Gaerfyrddin / Carmarthenshire |
| Iscoed | Beaumaris | Sir Ynys Mon / Isle of Anglesey | Sir Ynys Mon / Isle of Anglesey |
| Iscoed Road | Llanedi | Sir Gaerfyrddin / Carmarthenshire | Sir Gaerfyrddin / Carmarthenshire |
| Ise Road | Pipers Hill | Kettering District (B) | Northamptonshire County |
| Ise Vale Avenue | Desborough | Kettering District (B) | Northamptonshire County |
| Ise View Road | Desborough | Kettering District (B) | Northamptonshire County |
| Isebrook Court | Burton Latimer | Kettering District (B) | Northamptonshire County |
| Isel Road | Setmurthy | Allerdale District (B) | Cumbria County |
| Isel Road | Cockermouth | Allerdale District (B) | Cumbria County |
| Isenburg Way | Grove Hill | Dacorum District (B) | Hertfordshire County |
| Isenhurst Crescent | Mayfield and Five Ashes | Wealden District | East Sussex County |
| Iser Lane | Langside | Glasgow City | Glasgow City |
| Isfield Road | Little Horsted | Wealden District | East Sussex County |
| Isfield Road | Isfield | Wealden District | East Sussex County |
| Isfield Road | Ringmer | Lewes District | East Sussex County |
| Isfield Road | Hollingbury | The City of Brighton and Hove (B) | The City of Brighton and Hove (B) |
| Isfryn | Pembrey and Burry Port Town | Sir Gaerfyrddin / Carmarthenshire | Sir Gaerfyrddin / Carmarthenshire |
| Isfryn | Llangynog | Sir Gaerfyrddin / Carmarthenshire | Sir Gaerfyrddin / Carmarthenshire |
| Isfryn Road East | Prestatyn | Sir Ddinbych / Denbighshire | Sir Ddinbych / Denbighshire |
| Isfryn Road South | Prestatyn | Sir Ddinbych / Denbighshire | Sir Ddinbych / Denbighshire |
| Isglan Road | Whitford | Sir y Fflint / Flintshire | Sir Y Fflint / Flintshire |
| Isglan Road | Mostyn | Sir y Fflint / Flintshire | Sir Y Fflint / Flintshire |
| Isgoed | Conwy | Conwy / Conwy | Conwy / Conwy |
| Isgraig | Pembrey and Burry Port Town | Sir Gaerfyrddin / Carmarthenshire | Sir Gaerfyrddin / Carmarthenshire |
| Isgraig | Llangefni | Sir Ynys Mon / Isle of Anglesey | Sir Ynys Mon / Isle of Anglesey |
| Isham Close | Boughton Green | Northampton District (B) | Northamptonshire County |
| Isham Place | Holywells | Ipswich District (B) | Suffolk County |
| Isham Road | Norbury | Croydon London Boro | Greater London Authority |
| Isham Road | Pytchley | Kettering District (B) | Northamptonshire County |
| Isham Road | Orlingbury | Wellingborough District (B) | Northamptonshire County |
| Isham Road | West | City of Peterborough (B) | City of Peterborough (B) |
| Ishams Chase | Wickham Bishops | Maldon District (B) | Essex County |
| Isherwood | Battle | Rother District | East Sussex County |
| Isherwood Close | Great Aycliffe | County Durham | County Durham |
| Isherwood Close | Poulton-with-Fearnhead | Warrington (B) | Warrington (B) |
| Isherwood Close | Royston | North Hertfordshire District | Hertfordshire County |
| Isherwood Close | Park | City of Peterborough (B) | City of Peterborough (B) |
| Isherwood Drive | North Marple | Stockport District (B) | Stockport District (B) |
| Isherwood Fold | North Turton | Blackburn with Darwen (B) | Blackburn with Darwen (B) |
| Isherwood Place | Longton North | City of Stoke-on-Trent (B) | City of Stoke-on-trent (B) |
| Isherwood Road | Carrington | Trafford District (B) | Trafford District (B) |
| Isherwood Street | Hindley Green | Wigan District (B) | Wigan District (B) |
| Isherwood Street | Newbold | Rochdale District (B) | Rochdale District (B) |
| Isherwood Street | Heywood South | Rochdale District (B) | Rochdale District (B) |
| Isherwood Street | St. Matthew's | Preston District (B) | Lancashire County |
| Isherwood Street | Ewood | Blackburn with Darwen (B) | Blackburn with Darwen (B) |
| Isherwoods Way | Wem Urban | Shropshire | Shropshire |
| Isiah Avenue | Lawley and Overdale | Telford and Wrekin (B) | Telford and Wrekin (B) |
| Isidore Road | Stoney Hill | Bromsgrove District | Worcestershire County |
| Isigny Road | Kingsbridge | South Hams District | Devon County |
| Isinglass Close | Cheveley | East Cambridgeshire District | Cambridgeshire County |
| Isington Lane | Froyle | East Hampshire District | Hampshire County |
| Isington Lane | Binsted | East Hampshire District | Hampshire County |
| Isington Lane | Bentley | East Hampshire District | Hampshire County |
| Isington Road | Binsted | East Hampshire District | Hampshire County |
| Isis Avenue | Bicester | Cherwell District | Oxfordshire County |
| Isis Close | Brookside | Oadby and Wigston District (B) | Leicestershire County |
| Isis Close | Kersal | Salford District (B) | Salford District (B) |
| Isis Close | Congleton | Cheshire East (B) | Cheshire East (B) |
| Isis Close | West Putney | Wandsworth London Boro | Greater London Authority |
| Isis Close | Lympne | Shepway District | Kent County |
| Isis Close | West Ruislip | Hillingdon London Boro | Greater London Authority |
| Isis Close | Stoke Mandeville | Aylesbury Vale District | Buckinghamshire County |
| Isis Close | Winnersh | Wokingham (B) | Wokingham (B) |
| Isis Close | Hinksey Park | Oxford District (B) | Oxfordshire County |
| Isis Close | Hanborough | West Oxfordshire District | Oxfordshire County |
| Isis Close | Abingdon | Vale of White Horse District | Oxfordshire County |
| Isis Close | Haydon Wick | Swindon (B) | Swindon (B) |
| Isis Close | Calne | Wiltshire | Wiltshire |
| Isis Close | Redbridge | City of Southampton (B) | City of Southampton (B) |
| Isis Close | Honiton | East Devon District | Devon County |
| Isis Close | Magdalen East | Great Yarmouth District (B) | Norfolk County |
| Isis Court | Llandudno | Conwy / Conwy | Conwy / Conwy |
| Isis Court | Drypool | City of Kingston upon Hull (B) | City of Kingston Upon Hull (B) |
| Isis Drive | Cranham | Havering London Boro | Greater London Authority |
| Isis Grove | Smith's Wood | Solihull District (B) | Solihull District (B) |
| Isis Grove | Willenhall South | Walsall District (B) | Walsall District (B) |
| Isis Road | Brickhill | Bedford (B) | Bedford (B) |
| Isis Road | Peterlee | County Durham | County Durham |
| Isis Street | Earlsfield | Wandsworth London Boro | Greater London Authority |
| Isis Way | Hilton | South Derbyshire District | Derbyshire County |
| Isis Way | Wooburn | Wycombe District | Buckinghamshire County |
| Isis Way | Sandhurst | Bracknell Forest (B) | Bracknell Forest (B) |
| Isis Way | Alwalton | Huntingdonshire District | Cambridgeshire County |
| Isla Avenue | Cleland | North Lanarkshire | North Lanarkshire |
| Isla Avenue | Carnoustie West | Angus | Angus |
| Isla Brae | Keith | Moray | Moray |
| Isla Court | Alyth and Old Rattray | Perth and Kinross | Perth and Kinross |
| Isla Crescent | Strathord and Logiealmond | Perth and Kinross | Perth and Kinross |
| Isla Gardens | Carnoustie West | Angus | Angus |
| Isla Grove | Alyth and Old Rattray | Perth and Kinross | Perth and Kinross |
| Isla Place | Forfar Central | Angus | Angus |
| Isla Place | Mastrick | Aberdeen City | Aberdeen City |
| Isla Road | Alyth and Old Rattray | Perth and Kinross | Perth and Kinross |
| Isla Road | Rosemount | Perth and Kinross | Perth and Kinross |
| Isla Road | Strathord and Logiealmond | Perth and Kinross | Perth and Kinross |
| Isla Road | Kirriemuir East | Angus | Angus |
| Isla Road | Woolwich Common | Greenwich London Boro | Greater London Authority |
| Isla Road | Fife-Keith and Strathisla | Moray | Moray |
| Isla Road | Dunsinnan | Perth and Kinross | Perth and Kinross |
| Isla Road | Pictstonhill | Perth and Kinross | Perth and Kinross |
| Isla Street | Bowbridge | Dundee City | Dundee City |
| Island Bank Road | Inverness Central | Highland | Highland |
| Island Bank Road | Lochardil | Highland | Highland |
| Island Bank Road | Inverness Central | Highland | Highland |
| Island Bank Road | Lochardil | Highland | Highland |
| Island Carr Road | Brigg | North Lincolnshire (B) | North Lincolnshire (B) |
| Island Centre Way | Enfield Lock | Enfield London Boro | Greater London Authority |
| Island Close | De Montfort | Hinckley and Bosworth District (B) | Leicestershire County |
| Island Close | Ashby Woulds | North West Leicestershire District | Leicestershire County |
| Island Close | Staines Town | Spelthorne District (B) | Surrey County |
| Island Close | Hayling West | Havant District (B) | Hampshire County |
| Island Close | Broom | Rotherham District (B) | Rotherham District (B) |
| Island Crescent | Newquay | Cornwall | Cornwall |
| Island Drive | Aggborough and Spennells | Wyre Forest District | Worcestershire County |
| Island Drive | Holme Valley | Kirklees District (B) | Kirklees District (B) |
| Island Farm Avenue | Molesey South | Elmbridge District (B) | Surrey County |
| Island Farm Close | Merthyr Mawr | Pen-y-bont ar Ogwr / Bridgend | Pen-y-bont Ar Ogwr / Bridgend |
| Island Farm Close | Bridgend | Pen-y-bont ar Ogwr / Bridgend | Pen-y-bont Ar Ogwr / Bridgend |
| Island Farm Road | Sulhamstead | West Berkshire | West Berkshire |
| Island Farm Road | Ufton Nervet | West Berkshire | West Berkshire |
| Island Farm Road | Merthyr Mawr | Pen-y-bont ar Ogwr / Bridgend | Pen-y-bont Ar Ogwr / Bridgend |
| Island Farm Road | Molesey South | Elmbridge District (B) | Surrey County |
| Island Gardens | Eastville | City of Bristol (B) | City of Bristol (B) |
| Island Green | Weeping Cross | Stafford District (B) | Staffordshire County |
| Island Lane | Selsey | Chichester District | West Sussex County |
| Island Lane | Winmarleigh | Wyre District (B) | Lancashire County |
| Island Lane | Frinton and Walton | Tendring District | Essex County |
| Island Lanes | Bodmin | Cornwall | Cornwall |
| Island Loop | Selsey | Chichester District | West Sussex County |
| Island Mews | Port Talbot | Castell-nedd Port Talbot / Neath Port Talbot | Castell-nedd Port Talbot / Neath Port Talbot |
| Island Place | Llanelli | Sir Gaerfyrddin / Carmarthenshire | Sir Gaerfyrddin / Carmarthenshire |
| Island Place | St. Mary's | Liverpool District (B) | Liverpool District (B) |
| Island Road | Bayhead | Na h-Eileanan an Iar | Na H-eileanan An Iar |
| Island Road | Balloch East and Ravenswood | North Lanarkshire | North Lanarkshire |
| Island Road | Garthorpe and Fockerby | North Lincolnshire (B) | North Lincolnshire (B) |
| Island Road | Sturry | Canterbury District (B) | Kent County |
| Island Road | Thorpe-le-Soken | Tendring District | Essex County |
| Island Road | Frinton and Walton | Tendring District | Essex County |
| Island Road | Colliers Wood | Merton London Boro | Greater London Authority |
| Island Road | Evelyn | Lewisham London Boro | Greater London Authority |
| Island Road | Minster | Reading (B) | Reading (B) |
| Island Road | Whitley | Reading (B) | Reading (B) |
| Island Road | Sandwell | Birmingham District (B) | Birmingham District (B) |
| Island Road | Barrow Island | Barrow-in-Furness District (B) | Cumbria County |
| Island Road | St. Mary's | Liverpool District (B) | Liverpool District (B) |
| Island Road | Barry | Bro Morgannwg / the Vale of Glamorgan | Bro Morgannwg / The Vale of Glamorgan |
| Island Road | St. Ives | Cornwall | Cornwall |
| Island Road | Newton | Na h-Eileanan an Iar | Na H-eileanan An Iar |
| Island Road | Chislet | Canterbury District (B) | Kent County |
| Island Road | Sturry | Canterbury District (B) | Kent County |
| Island Road | Sarre | Thanet District | Kent County |
| Island Road | Westbere | Canterbury District (B) | Kent County |
| Island Road | Sandwell | Birmingham District (B) | Birmingham District (B) |
| Island Road South | St. Mary's | Liverpool District (B) | Liverpool District (B) |
| Island Row | Limehouse | Tower Hamlets London Boro | Greater London Authority |
| Island Street | Salcombe | South Hams District | Devon County |
| Island Street | Kilnknowe and Clovenfords | Scottish Borders | Scottish Borders |
| Island Terrace | Salcombe | South Hams District | Devon County |
| Island View | Barnhill and West Carse | Perth and Kinross | Perth and Kinross |
| Island View | Ardrossan North | North Ayrshire | North Ayrshire |
| Island View | Lochbroom | Highland | Highland |
| Island View | Kyloe | Northumberland | Northumberland |
| Island View Avenue | Mudeford | Christchurch District (B) | Dorset County |
| Island View Close | Milford-on-Sea | New Forest District | Hampshire County |
| Island View Gardens | Milford-on-Sea | New Forest District | Hampshire County |
| Island View Road | New Milton | New Forest District | Hampshire County |
| Island View Terrace | Nelson | City of Portsmouth (B) | City of Portsmouth (B) |
| Island Wall | Harbour | Canterbury District (B) | Kent County |
| Island Way East | Brompton | Medway (B) | Medway (B) |
| Island Way West | Brompton | Medway (B) | Medway (B) |
| Islands Brow | Moss Bank | St. Helens District (B) | St Helens District (B) |
| Islands Crescent | Hall Glen | Falkirk | Falkirk |
| Islands View Road | Shapinsay and Kirkwall Harbour | Orkney Islands | Orkney Islands |
| Islandsmead | Dorcan | Swindon (B) | Swindon (B) |
| Islandstone Lane | St. Nicholas, Hurst | Wokingham (B) | Wokingham (B) |
| Islawen Meadows | Pencoed | Pen-y-bont ar Ogwr / Bridgend | Pen-y-bont Ar Ogwr / Bridgend |
| Islay Avenue | Ward 2 | Inverclyde | Inverclyde |
| Islay Avenue | Cathkin / Springhall | South Lanarkshire | South Lanarkshire |
| Islay Close | Trowell | Broxtowe District (B) | Nottinghamshire County |
| Islay Close | Rothwell | Leeds District (B) | Leeds District (B) |
| Islay Close | Stanley | Blackpool (B) | Blackpool (B) |
| Islay Close | Whitby | Cheshire West and Chester (B) | Cheshire West and Chester (B) |
| Islay Close | St. Mary's | Gedling District (B) | Nottinghamshire County |
| Islay Court | Beancross | Falkirk | Falkirk |
| Islay Court | Earnock | South Lanarkshire | South Lanarkshire |
| Islay Court | Thornaby | Stockton-on-Tees (B) | Stockton-on-tees (B) |
| Islay Court | Logie Buchan | Aberdeenshire | Aberdeenshire |
| Islay Crescent | Glenburn North | Renfrewshire | Renfrewshire |
| Islay Crescent | Saltcoats North | North Ayrshire | North Ayrshire |
| Islay Crescent | Highworth | Swindon (B) | Swindon (B) |
| Islay Crescent | Mountblow | West Dunbartonshire | West Dunbartonshire |
| Islay Drive | Greenfarm | East Renfrewshire | East Renfrewshire |
| Islay Drive | Mountblow | West Dunbartonshire | West Dunbartonshire |
| Islay Gardens | Larkhall East | South Lanarkshire | South Lanarkshire |
| Islay Gardens | Hounslow West | Hounslow London Boro | Greater London Authority |
| Islay Gardens | Cosham | City of Portsmouth (B) | City of Portsmouth (B) |
| Islay Gardens | Carluke / Crawforddyke | South Lanarkshire | South Lanarkshire |
| Islay Grove | Fens | Hartlepool (B) | Hartlepool (B) |
| Islay Place | Workington | Allerdale District (B) | Cumbria County |
| Islay Place | North Kilmarnock, Fenwick and Waterside | East Ayrshire | East Ayrshire |
| Islay Quadrant | Garrion | North Lanarkshire | North Lanarkshire |
| Islay Road | Woodmill | Fife | Fife |
| Islay Road | Rosebank and Waterside | East Dunbartonshire | East Dunbartonshire |
| Islay Road | Oban South | Argyll and Bute | Argyll and Bute |
| Islay Road | Sinfin | City of Derby (B) | City of Derby (B) |
| Islay Road | Park | Fylde District (B) | Lancashire County |
| Islay Road | Inshes | Highland | Highland |
| Islay Street | Hallam | Sheffield District (B) | Sheffield District (B) |
| Islay View | South Kintyre | Argyll and Bute | Argyll and Bute |
| Islay Way | Old Monkland | North Lanarkshire | North Lanarkshire |
| Isle Bridge Road | Outwell | King's Lynn and West Norfolk District (B) | Norfolk County |
| Isle Close | Crowle | North Lincolnshire (B) | North Lincolnshire (B) |
| Isle Court | Lockerbie and Upper Annandale | Dumfries and Galloway | Dumfries and Galloway |
| Isle Lane | Bicton | Shropshire | Shropshire |
| Isle Lane | Oxenhope | Bradford District (B) | Bradford District (B) |
| Isle Of Ely Way | Wimblington | Fenland District | Cambridgeshire County |
| Isle Of Ely Way | Doddington | Fenland District | Cambridgeshire County |
| Isle Of Ely Way | Chatteris | Fenland District | Cambridgeshire County |
| Isle Of Ely Way | March | Fenland District | Cambridgeshire County |
| Isle Of Man | Ramsgreave | Ribble Valley District (B) | Lancashire County |
| Isle Of Man Street | Whitewell | Rossendale District (B) | Lancashire County |
| Isle Of Pin Road | Dundonald and Loans | South Ayrshire | South Ayrshire |
| Isle Of Pin Road | Troon East | South Ayrshire | South Ayrshire |
| Isle Of Thorns | Danehill | Wealden District | East Sussex County |
| Isle Of Wight Lane | Kensworth | Central Bedfordshire | Central Bedfordshire |
| Isle Of Wight Road | Swanage | Purbeck District | Dorset County |
| Isle Road | Portland | Weymouth and Portland District (B) | Dorset County |
| Isle Road | Outwell | King's Lynn and West Norfolk District (B) | Norfolk County |
| Isle Street | Whithorn | Dumfries and Galloway | Dumfries and Galloway |
| Islebeck Lane | Dalton | Hambleton District | North Yorkshire County |
| Isledane | Orchard Park and Greenwood | City of Kingston upon Hull (B) | City of Kingston Upon Hull (B) |
| Isledon Road | Finsbury Park | Islington London Boro | Greater London Authority |
| Isledon Road | Finsbury Park | Islington London Boro | Greater London Authority |
| Isleham Close | Allerton | Liverpool District (B) | Liverpool District (B) |
| Isleham Road | Fordham | East Cambridgeshire District | Cambridgeshire County |
| Islehurst Close | Chislehurst | Bromley London Boro | Greater London Authority |
| Islemoor Road | Fivehead | South Somerset District | Somerset County |
| Isleport Road | Burnham-on-Sea and Highbridge | Sedgemoor District | Somerset County |
| Isleport Road | Burnham without | Sedgemoor District | Somerset County |
| Isles Lane | Closworth | South Somerset District | Somerset County |
| Isles Lane | East Coker | South Somerset District | Somerset County |
| Isles Road | Ramsbury | Wiltshire | Wiltshire |
| Isles Road | Delting West | Shetland Islands | Shetland Islands |
| Isles Road | Delting East and Lunnasting | Shetland Islands | Shetland Islands |
| Isles Street | University | Bradford District (B) | Bradford District (B) |
| Isles Street | Newmilns | East Ayrshire | East Ayrshire |
| Islestone Court | Bamburgh | Northumberland | Northumberland |
| Islestone Court | Ord | Northumberland | Northumberland |
| Islestone Drive | North Sunderland | Northumberland | Northumberland |
| Islet Park | St. Mary's | Windsor and Maidenhead (B) | Windsor and Maidenhead (B) |
| Islet Park Drive | St. Mary's | Windsor and Maidenhead (B) | Windsor and Maidenhead (B) |
| Islet Road | St. Mary's | Windsor and Maidenhead (B) | Windsor and Maidenhead (B) |
| Isleworth Drive | Chorley North West | Chorley District (B) | Lancashire County |
| Isleworth Drive | Mackworth | City of Derby (B) | City of Derby (B) |
| Isleworth Road | Exwick | Exeter District (B) | Devon County |
| Isleworth Road | Cowick | Exeter District (B) | Devon County |
| Isley Road | Sherborne St. John | Basingstoke and Deane District (B) | Hampshire County |
| Isleys Court | Oldland | South Gloucestershire | South Gloucestershire |
| Islingham Farm Road | Frindsbury Extra | Medway (B) | Medway (B) |
| Islington | Belle Vale and Hasbury | Dudley District (B) | Dudley District (B) |
| Islington | Blundellsands | Sefton District (B) | Sefton District (B) |
| Islington | Wensley Fold | Blackburn with Darwen (B) | Blackburn with Darwen (B) |
| Islington | Everton | Liverpool District (B) | Liverpool District (B) |
| Islington | Everton | Liverpool District (B) | Liverpool District (B) |
| Islington | Smithdown | Liverpool District (B) | Liverpool District (B) |
| Islington | Trowbridge | Wiltshire | Wiltshire |
| Islington | Blundellsands | Sefton District (B) | Sefton District (B) |
| Islington Close | Newport | Telford and Wrekin (B) | Telford and Wrekin (B) |
| Islington Close | Lanehead | Burnley District (B) | Lancashire County |
| Islington Green | Farnworth | Halton (B) | Halton (B) |
| Islington Green | St. Mary's | Islington London Boro | Greater London Authority |
| Islington Green | St. Mary's | Islington London Boro | Greater London Authority |
| Islington Green | St. Peter's | Islington London Boro | Greater London Authority |
| Islington Grove | Kents Hill, Monkston and Brinklow | Milton Keynes (B) | Milton Keynes (B) |
| Islington High Street | St. Peter's | Islington London Boro | Greater London Authority |
| Islington Park Mews | St. Mary's | Islington London Boro | Greater London Authority |
| Islington Park Street | St. Mary's | Islington London Boro | Greater London Authority |
| Islington Road | Towcester | South Northamptonshire District | Northamptonshire County |
| Islington Road | Southville | City of Bristol (B) | City of Bristol (B) |
| Islington Road | Laleston | Pen-y-bont ar Ogwr / Bridgend | Pen-y-bont Ar Ogwr / Bridgend |
| Islington Road | Davenport | Stockport District (B) | Stockport District (B) |
| Islington Row | Edgbaston | Birmingham District (B) | Birmingham District (B) |
| Islington Row | Ladywood | Birmingham District (B) | Birmingham District (B) |
| Islington Row Middleway | Edgbaston | Birmingham District (B) | Birmingham District (B) |
| Islington Row Middleway | Ladywood | Birmingham District (B) | Birmingham District (B) |
| Islington Street | Blackfriars | Salford District (B) | Salford District (B) |
| Islington Street | Eastcott | Swindon (B) | Swindon (B) |
| Islington Street | Castle | City of Leicester (B) | City of Leicester (B) |
| Islington Way | Blackfriars | Salford District (B) | Salford District (B) |
| Islingword Place | Hanover | The City of Brighton and Hove (B) | The City of Brighton and Hove (B) |
| Islingword Road | Hanover | The City of Brighton and Hove (B) | The City of Brighton and Hove (B) |
| Islingword Street | Hanover | The City of Brighton and Hove (B) | The City of Brighton and Hove (B) |
| Islip Close | Thurstaston | Wirral District (B) | Wirral District (B) |
| Islip Court | Horncastle | East Lindsey District | Lincolnshire County |
| Islip Gardens | Northolt Mandeville | Ealing London Boro | Greater London Authority |
| Islip Gardens | Burnt Oak | Barnet London Boro | Greater London Authority |
| Islip Manor Road | Northolt Mandeville | Ealing London Boro | Greater London Authority |
| Islip Road | Summertown | Oxford District (B) | Oxfordshire County |
| Islip Road | Bletchingdon | Cherwell District | Oxfordshire County |
| Islip Street | Kentish Town | Camden London Boro | Greater London Authority |
| Islwyn | Llanelli Rural | Sir Gaerfyrddin / Carmarthenshire | Sir Gaerfyrddin / Carmarthenshire |
| Islwyn Avenue | Rhyl | Sir Ddinbych / Denbighshire | Sir Ddinbych / Denbighshire |
| Islwyn Close | Pengam | Caerffili / Caerphilly | Caerffili / Caerphilly |
| Islwyn Close | Ynysddu | Caerffili / Caerphilly | Caerffili / Caerphilly |
| Islwyn Close | Ebbw Vale | Blaenau Gwent / Blaenau Gwent | Blaenau Gwent / Blaenau Gwent |
| Islwyn Court | Risca | Caerffili / Caerphilly | Caerffili / Caerphilly |
| Islwyn Drive | Caerphilly | Caerffili / Caerphilly | Caerffili / Caerphilly |
| Islwyn Road | Ynysddu | Caerffili / Caerphilly | Caerffili / Caerphilly |
| Islwyn Road | Townhill | Abertawe / Swansea | Abertawe / Swansea |
| Islwyn Road | Crosskeys | Caerffili / Caerphilly | Caerffili / Caerphilly |
| Islwyn Road | Ynysddu | Caerffili / Caerphilly | Caerffili / Caerphilly |
| Islwyn Street | Ynysddu | Caerffili / Caerphilly | Caerffili / Caerphilly |
| Islwyn Street | Abercarn | Caerffili / Caerphilly | Caerffili / Caerphilly |
| Islwyn Terrace | Porth | Rhondda Cynon Taf / Rhondda Cynon Taf | Rhondda Cynon Taf / Rhondda Cynon Taf |
| Islwyn Way | Barry | Bro Morgannwg / the Vale of Glamorgan | Bro Morgannwg / The Vale of Glamorgan |
| Ismailia Road | Green Street West | Newham London Boro | Greater London Authority |
| Ismay Close | Maryport | Allerdale District (B) | Cumbria County |
| Ismay Drive | Liscard | Wirral District (B) | Wirral District (B) |
| Ismay Road | Springbank | Cheltenham District (B) | Gloucestershire County |
| Ismay Road | Litherland | Sefton District (B) | Sefton District (B) |
| Ismay Road | Chaddesden | City of Derby (B) | City of Derby (B) |
| Ismay Street | County | Liverpool District (B) | Liverpool District (B) |
| Ismay Wharf | Maryport | Allerdale District (B) | Cumbria County |
| Ismays Road | Ightham | Tonbridge and Malling District (B) | Kent County |
| Ismere Road | Kingsbury | Birmingham District (B) | Birmingham District (B) |
| Ismere Way | Broadwaters | Wyre Forest District | Worcestershire County |
| Ismyrddin | Abergwili | Sir Gaerfyrddin / Carmarthenshire | Sir Gaerfyrddin / Carmarthenshire |
| Isobel Close | Moss Side | Manchester District (B) | Manchester District (B) |
| Isobel Close | Winton | Salford District (B) | Salford District (B) |
| Isobella Road | Braunstone | Blaby District | Leicestershire County |
| Isom Close | Plaistow South | Newham London Boro | Greater London Authority |
| Ison Close | Biddenham | Bedford (B) | Bedford (B) |
| Ison Close | Cranwell and Byard's Leap | North Kesteven District | Lincolnshire County |
| Ison Hill Road | Henbury | City of Bristol (B) | City of Bristol (B) |
| Isons Close | Fowlmere | South Cambridgeshire District | Cambridgeshire County |
| Issa Road | Hounslow West | Hounslow London Boro | Greater London Authority |
| Issott Street | North West | Barnsley District (B) | Barnsley District (B) |
| Istead Rise | Istead | Gravesham District (B) | Kent County |
