Bob Hay may refer to:
- Bob Hay (musician), American singer and songwriter
- Bob Hay (general) (1920–1998), Australian army general and VFL footballer
- Bob Hay (footballer, born 1880) (1880–1959), Australian rules footballer for Fitzroy
- Bob Hay (footballer, born 1938), Australian rules footballer for St Kilda, see List of St Kilda Football Club players
- Bob Hay (racing driver), South African Formula One driver