Fahr is a German surname. Notable people with the surname include:
Jerry Fahr (1924–2010), Major League Baseball pitcher who played for one seasonJulius Fahr, Canadian businessmanKarl Theodor Fahr (1877–1945), German pathologist who was born in Pirmasens of the Rhineland-PalatinateOtto Fahr (1892–1969), German backstroke swimmer, who competed in the 1912 Summer Olympics