| Place | Type | AsNotedIn |
|---|---|---|
| Belleville, IL | Town | |
| Cahokia | Place | |
| Collinsville | Place | |
| East St Louis | Place | |
| Lebanon, IL | Town | |
| Marissa | Place | |
| Mascoutah | Place | |
| New Athens | Place | |
| North Dupo | Place | |
| O'Fallon | Place | |
| Scott Air Force Base | Place | |
| St Libory | Place |
| Particulars for St Clair County: | |
|---|---|
| Locale Type | US County |
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