Bon Air is a census-designated place in Chesterfield County, Virginia, United States. The population was 18,022 at the 2020 census. The community is considered a suburb of the independent city of Richmond in the Richmond-Petersburg region and is a part of the Southside neighborhoods. Originally developed as a resort, a central portion of Bon Air has been designated as a National Historic District with many structures of Victorian design from the late 19th and early 20th centuries.