Albemarle County is a county located in the Piedmont region of the Commonwealth of Virginia. Its county seat is Charlottesville, which is an independent city and enclave entirely surrounded by the county. Albemarle County is part of the Charlottesville Metropolitan Statistical Area. As of the 2020 census, the population was 112,395.

Albemarle County was created in 1744 from the western portion of Goochland County, though portions of Albemarle were later carved out to create other counties. Albemarle County was named in honor of Willem Anne van Keppel, 2nd Earl of Albemarle. Its most famous inhabitant was Thomas Jefferson, who built his estate home, Monticello, in the county.