Washington County, D.C.

An 1835 map of Washington and Alexandria County in the District of Columbia, prior to retrocession

The County of Washington was one of five original political entities within the District of Columbia, the capital of the United States. Formed by the Organic Act of 1801 from parts of Montgomery and Prince George's County, Maryland, Washington County referred to all of the District of Columbia "on the east side of the Potomac, together with the islands therein." The bed of the Potomac River was also considered to be part of Washington County.[1]

Originally Alexandria County, D.C. formed the portion of the District west of the Potomac River, ceded by the commonwealth of Virginia. Alexandria County, including the City of Alexandria, was returned to Virginia by Congress in 1846, leaving just Washington County. Within Washington County there were two incorporated areas, the City of Washington and the City of Georgetown. At times the rural parts outside of the cities were referred to as "Washington County" but all three were part of the county.[2] Upon the passage of the District of Columbia Organic Act of 1871, the three governments were unified under a single District government and made coterminous,[3] ending Washington County's separate identity.

  1. ^ Proctor, John Clogett, ed. (1930). Washington Past and Present. Vol. 1. New York: Lewis Historical Publishing Company Inc. p. 52.
  2. ^ "Populations of the States and Counties of the United States 1790-1990" (PDF). Retrieved 14 February 2017.
  3. ^ Richards, Mark David (Spring–Summer 2004). "The Debates over the Retrocession of the District of Columbia, 1801–2004" (PDF). Washington History. Historical Society of Washington, D.C.: 54–82. Retrieved 2009-01-16.

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