Midlothian is an unincorporated area and census-designated place in Chesterfield County, Virginia, United States. Settled as a coal town, Midlothian village experienced suburbanization effects and is now part of the western suburbs of Richmond, south of the James River in the Greater Richmond Region. Because of its unincorporated status, Midlothian has no formal government, and the name is used to represent the original small Village of Midlothian and a vast expanse of Chesterfield County in the northwestern portion of Southside Richmond served by the Midlothian post office. As of the 2020 census, Midlothian had a population of 18,320.