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Welcome to our upgraded platform! If you've arrived from an older, indexed link, you might feel a bit confusing. Don't worry — our powerful search form is here to help! Use it to quickly find anything you're looking for, from streets and places to a wide range of other information. Thanks for your support as we work to improve your experience!
List of United States Towns and Cities from letter O, in Illinois, United States
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| # | Place Name | Location | Type |
|---|---|---|---|
| 1 | Old Sand Prairie Cemetery | Tazewell / South Pekin | Cemetery |
| 2 | Old Altamont Reservoir | Effingham / Altamont East | Reservoir |
| 3 | Old Bethel Cemetery | Wabash / Bone Gap | Cemetery |
| 4 | Old Calvary Cemetery | Macoupin / Carlinville West | Cemetery |
| 5 | Otter Creek-Hyatt Elementary School | LaSalle / Streator North | School |
| 6 | Oliver W Holmes Elementary School | Cook / River Forest | School |
| 7 | Our Lady of Mount Carmel School (historical) | Cook / River Forest | School |
| 8 | O Brien School (historical) | Livingston / Dwight | School |
| 9 | O'Boyle Point | Lake / Fox Lake | Cape |
| 10 | O'Brien Cemetery | Tazewell / Marquette Heights | Cemetery |