Mecklenburg County is a county located on the border in the southwestern part of the state of North Carolina, in the United States. As of the 2010 census, the population was 919,618. It increased to 1,034,070 as of the 2015 estimate, making it the most populous county in North Carolina and the first county in the Carolinas to surpass 1 million in population. Its county seat and largest city is Charlotte.
Mecklenburg County is included in the Charlotte-Concord-Gastonia, NC-SC Metropolitan Statistical Area. On September 12, 2013, the county welcomed its one millionth resident.
Like its seat, the county is named after Charlotte of Mecklenburg-Strelitz, queen of the United Kingdom, whose name is derived from the region of Mecklenburg in Germany, itself deriving its name from Mecklenburg Castle (Mecklenburg meaning "large castle" in Low German) in the village of Dorf Mecklenburg.