Gass is a surname. Notable people with this surname include:
A. J. Gass (born 1975), Canadian football playerBob Gass, American-based Irish Christian pastor, broadcaster and authorCharles George Gass (1898–1977), Royal Air Force officer, gunner ace in World War IElizabeth Gass, Lady Gass (born 1940), Lord Lieutenant of Somerset, EnglandFloyd Gass (1927–2006), American football and basketball player, coach, and college athletics administratorIan Graham Gass (1926–1992), British geologist, Professor of Earth Sciences at the Open UniversityJack Gass, 19th century American professional football playerJohn Bradshaw Gass (1855–1939), British architect and artistJohn Donald MacIntyre Gass (1928–2005), Canadian-American ophthalmologistKarl Gass (1917–2009), German documentary filmmakerKyle Gass (born 1960), American rock musician, singer-songwriter and actorMelbourne Gass (born 1938), Canadian businessman and former politicianSir Michael Gass (1916–1983), British colonial administratorNabo Gass (born 1954), German painter and glass artistOctavius D. Gass (1824-1924), American prospector and rancherPatrick Gass (1771–1870), U.S. Army sergeant, member of the Lewis and Clark ExpeditionRobert Gass (born 1948), American musician and member of the bands Bead Game and the Freedom ExpressSir Simon Gass (born 1956), British diplomatThomas Gass (born 1963), Swiss scientist and economist, United Nations Assistant Secretary-General for Policy Coordination and Inter-Agency AffairsWilhelm Gass (1813–1889), German theologianWilliam H. Gass (born 1924), American novelist, short story writer, essayist, critic, former philosophy professor