Department of Washington, was a department of theUnion Army constituted on April 9, 1861. It consisted of theDistrict of Columbia to its original boundaries, and the State ofMaryland as far asBladensburg. It was merged into theMilitary Division of the Potomac on July 25, 1861. Later it was recreated on February 2, 1863 as the consolidated Department of Washington andXXII Corps. It was again made the Department of Washington in 1865 and that command remained until 1869 when it was disbanded.

• Lieutenant ColonelCharles Ferguson Smith, April 10, 1861 to April 28, 1861.
• ColonelJoseph K. Mansfield, April 28, 1861 to March 15, 1862.

• Major GeneralSamuel P. Heintzelman, February 7, 1863 to October 14, 1863.
• Major GeneralChristopher C. Augur, October 14, 1863 to June 27, 1865.^[1]
• John Parke June 6–27, 1865

• ? June 27, 1865 – ?

• Carver Barracks, DC, 1861
• Camp Davis, DC, 1861
• Camp Lacey, DC, 1861

• Civil War Defenses of Washington

• Eicher, John H., & Eicher, David J.,Civil War High Commands, Stanford University Press, 2001,ISBN 0-8047-3641-3.
• National Archives, Guide to Federal Records; Records of United States Army Continental Commands, 1821–1920 (Record Group 393), 1817–1940 (bulk 1817–1920)

This article about a specific military unit of the American Civil War is astub. You can help Wikipedia byexpanding it.

• v
• t
• e

• Union army departments
• Departments and districts of the United States Army
• Union army corps
• 1861 establishments in Washington, D.C.
• American Civil War unit and formation stubs

• Articles with short description
• Short description matches Wikidata
• Use mdy dates from October 2018
• All stub articles