Mercer

There's more than one place called Mercer:

United States of America

 * 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 - an island city in Washington (state)