Walter Lenox (August 17, 1817 – July 16, 1874) was Mayor of Washington, D.C. for one two-year term, from 1850 to 1852. Lenox was the first mayor to be born in the city of Washington, graduating from Yale in 1837 and returning to the capital to practice law in the early 1840s. During at least part of that period, he lived with future Washington mayor Richard Wallach. Lenox was a Whig, which became a liability in the mayoral election of 1852 (the year in which the Whig Party collapsed). His Democratic opponent, John Walker Maury, defeated Lenox by almost 900 votes.