Robert E. Duvall was an American politician from Maryland. He served as a member of the Maryland House of Delegates, representing Harford County in 1856.
In 1858, Duvall was appointed by governor Thomas Holliday Hicks as assistant inspector of flour. He was appointed again by governor Thomas Swann in 1868.
Duvall was a Know Nothing. Duvall served as a member of the Maryland House of Delegates, representing Harford County in 1856.