Robert Hunter Morris (February 15, 1808 – October 24, 1855) was an attorney and the 64th Mayor of New York City.

He served as an assistant to U.S. Attorney James A. Hamilton and as a member of the New York State Assembly in 1833 and 1834.

He served in that capacity until 1841, when Governor William H. Seward removed him from office in connection with the Glentworth scandal.

The Glentworth conspiracy involved a plot by tobacco inspector James B. Glentworth to send workers from Pennsylvania to New York under the guise of laying pipes for the city, but in reality to cast votes for Whig presidential candidate William Henry Harrison.

While serving as mayor in 1841, Morris took part in the investigation and arrest of John C. Colt for the murder of Samuel Adams.