Mecklenburg County is a county located in the U.S. state of North Carolina. As of 2008, the population was 902,803. Its county seat is Charlotte. It is the most populous county in the state.
Mecklenburg County was formed in 1762 from the western part of Anson County. It was named for the German state of Mecklenburg-Strelitz.
In 1768 the part of Mecklenburg County west of the Catawba River became Tryon County. The Mecklenburg Declaration of Independence was allegedly signed on May 20, 1775; if the document is indeed genuine, Mecklenburg County was the first part of the Thirteen Colonies to declare independence from Great Britain. In 1792 the northeastern part of Mecklenburg County became Cabarrus County. Finally, in 1842 the southeastern part of Mecklenburg County was combined with the western part of Anson County to become Union County.
James Knox Polk, the eleventh President of the United States, was born here in 1795 in what is now Pineville.