Grand Ledge is a city in the U.S. state of Michigan. The city lies mostly within Eaton County, though a small portion extends into Clinton County, and sits above the Grand River 12.7 miles (20.4 kilometers) directly west of downtown Lansing. The population was 7,786 at the 2010 census. The city is well known for, and named for, its 300-million-year-old, sandstone and quartzite rock ledges that rise above the Grand River and are used by recreational rock climbers.