List of mayors of Washington, D.C.

Below is a list of mayors of Washington, D.C., and associated political entities.

The federal district of the United States was first designated by the amended Residence Act of 1790. That Act designated that the President could appoint three commissioners to locate, define and survey an area not exceeding ten miles square as the capital district, following the Constitutional mandate to do so. From 1791 to 1802 the District was managed by that three-member Board of Commissioners of the Federal City as listed below.

With the passage of the District of Columbia Organic Act of 1801, the District was brought under the direct political control of Congress. The Board of Commissioners was dissolved. That Act made no provision for an executive for the District as a whole. The District consisted of five political subdivisions: three cities with their own municipal governments, and two rural counties. The pre-existing city of Georgetown and its mayors are listed below. The pre-existing city of Alexandria, Virginia, had its own list of mayors before, during and after its inclusion in the District. And the new City of Washington was chartered shortly after the District, in 1802. Its mayors also appear below. The rural county west of the Potomac, formerly Virginia, was Alexandria County. Finally to the east and outside the cities, formerly Maryland, lay Washington County, D.C. (Both counties were governed by levy courts made of providentially appointed Justices of the Peace, whose members do not appear below. Prior to 1802, those Justices of the Peace were appointed by the governors of Maryland and Virginia, after which they were appointed by the President until they were abolished in 1871).

In 1846, Alexandria County and the City of Alexandria returned to Virginia, leaving the District with two independent cities and one county.

In 1871, with the District of Columbia Organic Act, those three subdivisions within the District were unified into a single government, whose chief executive was a territorial Governor. As listed below, only two served before this office was abolished in 1874, and replaced with a temporary three-member Board of Commissioners appointed by the President. The board was made permanent in 1878 and this system continued until 1967, when it was replaced by a single mayor-commissioner and city council appointed by the President. Finally, in 1974, the District of Columbia Home Rule Act allowed for District residents to elect their own mayor.

Currently, the Mayor of the District of Columbia is popularly elected to a four-year term with no term limits. Even though District of Columbia is not a state, the district government also has certain state-level responsibilities, making some of the mayor's duties analogous to those of United States governors. The current mayor of the District of Columbia is Muriel Bowser, a Democrat, who has served in the role since January 2, 2015.

The lists on this page include all of the chief executives of the District of Columbia in their various forms.

The 1790 Act for establishing the temporary and permanent seat of the Government of the United States, Act of March 3, 1791, 1 Stat. 214, set up a board of three commissioners to survey and define the territory of the Federal City, and to purchase land for development and oversee the construction of all federal buildings. Some reports name Thomas Johnson as the chairman of the Board of Commissioners, but it appears there was no chair, even if Johnson acted in the manner of a chair. The commission had very little to do with the municipal regulation of the District and when their board was dissolved their powers were transferred to the "Superintendent", "Commissioner to Superintend Public Buildings" and the "Chief Engineer of the United States Army." The local public affairs were instead governed by a Levy Court made up of Justices of the Peace who, until passage of the Organic Act of 1801 were commissioned by the governors of Virginia (for Arlington County) and Maryland (for Prince George's and Montgomery County – the north part of the District remained part of these counties until 1801), and in the Federal city their powers were transferred to the Mayor and local government. During this time William Thornton, Robert Bowie, Daniel Carroll, and Robert Brent were some of the men who served on the Levy Court of Prince George's County.