Robert Harrison Allen (February 24, 1840 – November 9, 1895) was an American merchant, planter, and Democratic politician.

He represented Itawamba and Lee Counties in the Mississippi State Senate from 1872 to 1880.

[4] During the American Civil War, Allen served as a Lieutenant in the 19th Mississippi Infantry.

[1] In 1871, Allen was elected to represent the 21st District (Itawamba and Lee Counties) as a Democrat in the Mississippi State Senate.

[6][5] Allen was the appointed by President Grover Cleveland to be a Receiver of Public Monies in the Oklahoma Territory.