Nicholas Ruxton Moore (July 21, 1756 – October 7, 1816) was a U.S. Representative from Maryland. Born near Baltimore in the Province of Maryland, Moore attended the common schools. He served as a member of Gist's Baltimore Independent Cadets and served throughout the greater part of the Revolutionary War, attaining the rank of captain. He served as the commander of the Baltimore Light Dragoons during the conflict. While in service, Moore wrote to George Washington to request an acceptance of his resignation from the Army; George Washington, through a letter written by James McHenry, granted permission for Moore to resign provided he had all his accounts settled with his regiment. He also took an active part in the suppression of the Whiskey Insurrection in 1794.