Stewartville was an unincorporated place in eastern Contra Costa County, California that is now a ghost town. It was located 6 miles (10 km) northeast of Mount Diablo, at an elevation of 558 feet (170 m). It was a mining town for the nearby coal mines.
A post office operated at Stewartville from 1882 to 1902. The place was named for William Stewart, coal mine owner.
References
- U.S. Geological Survey Geographic Names Information System: Stewartville, California
