Henry Truman Phelps (August 25, 1871 – December 4, 1944) was an American architect responsible for the design of many Texas county courthouses and other public and commercial buildings in San Antonio and around the state.
He began working as a draftsman in various architectural offices in San Antonio by the time he was 20.
From 1902 to 1909, Phelps opened several architectural firms both by himself and partnering with others.
Phelps married Laura Clamp in San Antonio in 1905, and the couple had two children.
He died of a heart attack in San Antonio.