There's more than one place called '''Mercer''':
Mercer (North Dakota) - a small city in McLean County (North Dakota), Lakes and Gardens, North Dakota
Mercer (Pennsylvania) - a town in Mercer County, Pennsylvania
Mercer (Wisconsin) - a town in Iron County, Wisconsin
Mercer Island (Washington) - an island city in Washington (state)
See also
Mercer County (disambiguation)