Jack Spencer

Jack Spencer may refer to:
 * Jack Spencer (1900s rugby league), English rugby league footballer
 * Jack Spencer (rugby league, born 1920) (1920–1998), Australian rugby league footballer for the Balmain Tigers
 * Jack Spencer (rugby league, born 1990), English rugby league player for the Wests Tigers
 * Jack Spencer (footballer) (1920–1966), English Association football (soccer) player
 * Jack Spencer (basketball) (1923–2004), American college basketball coach