UpAlphabetical listing of Places in Illinois
| Name | What | Region | Country | Lat | Long | Elev ft. | Pop est |
|---|
| Seaton | city | Illinois | United States | 41.10 | -90.80 | 830 | |
| Seatonville | city | Illinois | United States | 41.36 | -89.28 | 830 | |
| Sebastopol | city | Illinois | United States | 38.71 | -89.60 | 830 | |
| Secor | city | Illinois | United States | 40.74 | -89.14 | 830 | |
| Seehorn | city | Illinois | United States | 39.76 | -91.26 | 830 | |
| Sefton | city | Illinois | United States | 39.07 | -88.96 | 830 | |
| Sellers | city | Illinois | United States | 40.19 | -88.10 | 830 | |
| Selma (historical) | city | Illinois | United States | 38.43 | -87.75 | 383 | |
| Selmaville | city | Illinois | United States | 38.61 | -89.00 | 830 | |
| Seminary | city | Illinois | United States | 38.58 | -88.13 | 830 | |
| Seneca | city | Illinois | United States | 41.31 | -88.61 | 830 | |
| Sepo | city | Illinois | United States | 40.34 | -90.12 | 830 | |
| Serena | city | Illinois | United States | 41.49 | -88.73 | 830 | |
| Sesser | city | Illinois | United States | 38.09 | -89.05 | 830 | |
| Seville | city | Illinois | United States | 40.49 | -90.34 | 830 | |
| Seward | city | Illinois | United States | 42.24 | -89.36 | 879 | |
| Sexson Corner | city | Illinois | United States | 39.39 | -88.52 | 830 | |
| Seymour | city | Illinois | United States | 40.11 | -88.43 | 830 | |
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