- Located just off IL 3 along the Mississippi River opposite
Scott City
- Latitude: 37°13'15" N (+37.2208)
- Longitude: 89°27'39" W (-89.4608)
- Elevation: 413 feet above sea level
- Public Land Survey: T. 15 S., R. 3 W.
- Precinct: Thebes
- Land area: 1.8 square miles
- Water area: 0.51 square miles (328.2 acres)
As the crow flies, Thebes is...
| Year | Population | Percent change |
|---|
| 1990 | 461 | -- |
| 2000 | 478 | +3.7% |