Harsh is a surname. Notable people with the surname include:
Frank Harsh (1894–1956), American football and basketball coach George Harsh (1810–1897), American politician from Ohio Griffith R. Harsh (born 1953), American surgeon John Harsh (1825–1906), American politician from Wisconsin Leonard Harsh (1801–1866), American politician from Ohio Lester Harsh (1910–1994), American politician from Nebraska Sabastian Harsh, American football player Vivian G. Harsh (1890–1960), American librarian