William Richardson (1735–1825) was a Maryland politician and Continental Army officer. Richardson served in the Maryland Assembly from 1773–1776, introducing the bill that formed Caroline County in 1774. As Colonel of the 5th Maryland Regiment he participated in Battle of Harlem Heights in 1776, moved the Continental Treasury from Philadelphia to Baltimore in 1777, and fought at the Battle of Camden in 1780. In later life he also served as a Presidential Elector.
Colonel Richardson High School and Colonel Richardson Middle School in Federalsburg, Maryland are named for him.