Grand Tower is a city in Jackson County, Illinois, United States.

[3] The town gets its name from Tower Rock, a landmark island in the Mississippi River.

[9] Grand Tower is located in southwestern Jackson County and is bordered to the west by the Mississippi River, which forms the Missouri–Illinois boundary.

Illinois Route 3 runs through an eastern extension of the city limits, leading north (upriver) 32 miles (51 km) to Chester, where the Chester Bridge crosses the Mississippi, and south 25 miles (40 km) to Illinois Route 146, which crosses the Mississippi to Cape Girardeau, Missouri.

[10] Immediately to the south of the city is a small portion of Perry County, Missouri, which is known as "Grand Tower Island".

The Grand Tower Energy Center is a 478 megawatt combined cycle gas-fired facility which produces power for the region.

[14] A work of levees protects the community from flooding when the Mississippi River water levels rise.

This park provides RV camping, playgrounds, picnic facilities, and a shower house.