Jack Hewitt (born July 8, 1951), is an American former professional dirt track racing driver.

Hewitt began his sprint car racing career in 1975 at Eldora Speedway, taking three wins in his inaugural season.

By doing so he became the first and only driver to win all four divisions of racing at the 4-Crown Nationals held at Eldora Speedway in Rossburg, Ohio.

He first appeared as part of the four man USA sedan teams that raced mainly at the Liverpool Speedway and Newcastle Motordrome during the late 1970s and early 1980s (while sometimes also driving Sprintcars).

He won he 1980 Marlboro Grand National 100 lap event at Liverpool and later in the decade returned to Australia as a Sprintcar driver, winning the Grand Annual Sprintcar Classic at the Premier Speedway in Victoria in 1991 where he defeated fellow American Danny Smith, and leading Australian driver Max Dumesney.