Bob, Bobby or Robert Mann may refer to:
Sports Bob Mann (American football) (1924–2006), American football player Bob Mann (golfer) (born 1951), American golfer Bobby Mann (born 1974), Scottish footballer
Others Bob Mann (Canadian politician), Ontario Communist Party candidate Bob Mann (guitarist) (born 1944), American guitarist/keyboardist Robert Mann (1920–2018), musician Robert Mann (Royal Navy officer) (1748–1813), British admiral Robert James Mann (1817–1886), English physician and science writer Robert Trask Mann (1924–2002), American judge and politician in the Florida House of Representatives Robert Wellesley Mann (1924–2006), pioneer in the field of medical prosthetics Robert E. Mann, member of the Illinois House of Representatives Robert Mann (physicist), Canadian physicist