Concord is the most populous city in Cabarrus County, North Carolina, United States, and its county seat. The city had a population of 105,2…Concord is the most populous city in Cabarrus County, North Carolina, United States, and its county seat. The city had a population of 105,240 at the 2020 census. Concord is the second-most populous city in the Charlotte metropolitan area, tenth-most populous city in North Carolina and 287th-most populous city in the U.S.