Jack Howell may refer to:
Jack Howell (baseball) (born 1961), former Major League Baseball third baseman Jack Howell (footballer) (1924–1994), Australian rules footballer Jack Howell (physician) (1926–2015), British physician Jack Howell (swimmer) (1899–1967), American Olympic swimmer Jack P. Howell (1895–1971), Australian rules footballer Jack Howell (triathlete) (born 2004), Australian para-triathlete
See also John Howell (disambiguation)