The District of Columbia was consolidated under a single government in 1871. For Data 1800–1870, before D.C. consolidation:"1870 Census Information"(PDF). United States Census Bureau. p. 12. Archived from the original on 27 March 2010. Retrieved 30 January 2022. Data 1880–1890, after D.C. consolidation:"1890 Census Information". United States Census Bureau. Retrieved 2 June 2012.
The District of Columbia was consolidated under a single government in 1871. For Data 1800–1870, before D.C. consolidation:"1870 Census Information"(PDF). United States Census Bureau. p. 12. Archived from the original on 27 March 2010. Retrieved 30 January 2022. Data 1880–1890, after D.C. consolidation:"1890 Census Information". United States Census Bureau. Retrieved 2 June 2012.
Romero, Adam P.; Amanda Baumle; M.V. Lee Badgett; Gary J. Gates (December 2007). "Census Snapshot: Washington, D.C."(PDF). The Williams Institute. Archived from the original(PDF) on 2011-08-19. Retrieved 2008-05-27.
Romero, Adam P.; Amanda Baumle; M.V. Lee Badgett; Gary J. Gates (December 2007). "Census Snapshot: Washington, D.C."(PDF). The Williams Institute. Archived from the original(PDF) on 2011-08-19. Retrieved 2008-05-27.
The District of Columbia was consolidated under a single government in 1871. For Data 1800–1870, before D.C. consolidation:"1870 Census Information"(PDF). United States Census Bureau. p. 12. Archived from the original on 27 March 2010. Retrieved 30 January 2022. Data 1880–1890, after D.C. consolidation:"1890 Census Information". United States Census Bureau. Retrieved 2 June 2012.