Arlington County, Virginia
Founding: 1801 (as Alexandria County ) Parent county: Fairfax Namesake: Arlington House Seat: Alexandria (1801–1870); Arlington (1870–) Land area: 26 square miles Population (2020): 238,643 Population (historic): 5,949 (1800); 9,573 (1830); 12,652 (1860); 6,430 (1900); 26,615 (1930) Periods of population growth: pre-1800–1820; 1830–1970; 1980–2020 Subdivisions: None Pre-1940 residences (estimated): 10,136 (9.1%) Pre-1940 housing survival rate: 60.5% Housing in disrepair (1950): 1% Average farmhouse value (1930): $4,813 Average outbuilding value (1930): $2,981 Number of farms (1920): 56 Average farm size (1920): 32.4 acres _________________________________________________________________________________ Alexandria (historic) Namesake: Alexandria, Egypt Founding: 1749 (platting); 1779 (incorporation) Population (2020): 159,467 Populatio...