Hiram B. Warner (October 29, 1802 – June 30, 1881) was an American politician, lawyer, educator and jurist from Georgia.

In 1846, he became a judge on the Supreme Court of Georgia and remained on that body until his resignation in 1853.

In 1854, Warner won election to the 34th United States Congress as a Democratic Representative of Georgia's 4th congressional district and served one term from March 4, 1855, to March 3, 1857.

Georgia Governor Charles J. Jenkins appointed Warner as judge of the Coweta Circuit Court in 1865 and he remained in that position until 1867 when he was appointed as Chief Justice of the State supreme court.

He was subsequently elected to that position and served in that capacity until he resigned in 1880.