William Plumsted (November 7, 1708 – August 10, 1765) was the mayor of Philadelphia in 1750, 1754, and 1755.
The son of Clement Plumsted, who was also a mayor of Philadelphia, he served also as councilman, register of wills, and justice.
[3] He was also a founder of the Academy and College of Philadelphia (now the University of Pennsylvania), of which he served as a trustee until his death.
[2] Plumsted was married to Rebecca Kearney, daughter of Philip Kearny of Philadelphia, and whose sister Mary was the wife of Chief Justice John Kinsey.
[6] Through his daughter Elisabeth, he was a grandfather of Agnes Murray Elliot (1763–1860), who married Sir David Carnegie, 4th Baronet, and Elizabeth Elliot (c. 1764–1847), who married William Cathcart, 1st Earl Cathcart.