Mamers ( MAY-murs is an unincorporated community and census-designated place in Harnett County, North Carolina, United States. The population was 826 at the 2010 census. It is a part of the Dunn Micropolitan Area, which is also a part of the greater Raleigh–Durham–Cary Combined Statistical Area as defined by the …Mamers ( MAY-murs is an unincorporated community and census-designated place in Harnett County, North Carolina, United States. The population was 826 at the 2010 census. It is a part of the Dunn Micropolitan Area, which is also a part of the greater Raleigh–Durham–Cary Combined Statistical Area as defined by the United States Census Bureau.