Hirth is a surname. Notable people with this surname include:
Friedrich Hirth Ph.D. (1845–1927), German-American sinologist Georg Hirth (1841–1916), German writer, journalist and publisher Greg Hirth (born 1963), American geophysicist Hellmuth Hirth (1886–1938), German engineer who founded the Mahle GmbH and Hirth companies John Joseph Hirth (1854–1931), Catholic Bishop in German East Africa Wolf Hirth (1900–1959), German gliding pioneer and sailplane designer
See also Hirth, aircraft engine manufacturer based in Benningen, Germany Hirthia, a genus of tropical freshwater snails Ghirth, a Hindu agricultural caste in Himachal Pradesh, North India