Lincolnton is a small city in Lincoln County, North Carolina, United States, within the Charlotte metropolitan area. The population was 10,683 at the 2010 census. Lincolnton is northwest of Charlotte, on the South Fork of the Catawba River. The junction of State Highway 27 and U.S. Route 321 is located nearby. The city is the county seat of Lincoln County, and is the only legally incorporated municipality wholly within the rural county.