Lincolnton is a city in Lincoln County, North Carolina, United States within the Charlotte metropolitan area. The population was 11,091 at the 20…Lincolnton is a city in Lincoln County, North Carolina, United States within the Charlotte metropolitan area. The population was 11,091 at the 2020 census, with an estimated population of 12,128, as of 2023. Lincolnton is northwest of Charlotte, on the South Fork of the Catawba River. The city is the county seat of Lincoln County.