- Location: Jackson County, Illinois
- Legal status: City
- Population: 624 (Change since 1990: -19.5%)
- Name origin: Tower Rock
- Located just west of IL 3 on the Mississippi River
downstream from Wittenberg, MO
- Latitude: 37°37'35" N (+37.6264)
- Longitude: 89°29'52" W (-89.4978)
- Elevation: 361 feet above sea level
- Public Land Survey: T. 10 S., R. 4 W., Sec. 25
- Civil township: Grand Tower
- Land area: 1.3 square miles
- Water area: 0.00 square miles (1.1 acres)
As the crow flies, Grand Tower is...
Name origin
Named for Tower Rock, a rock
promontory sitting on an island near the Missouri side of the river
| Year | Population | Percent change |
|---|
| 1990 | 775 | -- |
| 2000 | 624 | -19.5% |