| Intro | Recipient of the Purple Heart medal |
| Was | Politician |
| From | United States of America |
| Type | Politics |
| Gender | male |
| Birth | 11 November 1889, Williamston, Anderson County, South Carolina, U.S.A. |
| Death |
11 June 1962, Greenville, Greenville County, South Carolina, U.S.A. (aged 72 years) |
| Politics | Democratic Party |
Gabriel Heyward Mahon Jr. (November 11, 1889 – June 11, 1962) was a U.S. Representative from South Carolina.
Born in Williamston, South Carolina, Mahon moved with his parents to Greenville, South Carolina, in 1898. He attended the public schools and The Citadel in Charleston, South Carolina. He was employed as a clerk in a retail store 1900-1907 and as a traveling salesman 1907-1911. He engaged in the retail clothing business in 1911. During the First World War he served as a captain and later as a major of the First Battalion of the One Hundred and Eighteenth Infantry, Thirtieth Division, American Expeditionary Forces. In the course of his service, he was awarded the Purple Heart and the Silver Star medal. After the war, he served as a trustee of Greenville Woman’s College from 1921 to 1936.
Mahon was elected as a Democrat to the Seventy-fourth Congress to fill the vacancy caused by the death of John J. McSwain and on the same day was elected to the Seventy-fifth Congress and served from November 3, 1936, to January 3, 1939. He was an unsuccessful candidate for renomination in 1938. He resumed former business pursuits in Greenville, South Carolina, until his death there June 11, 1962. He was interred in Woodlawn Memorial Park Mausoleum.