John Wittenberg (2 October 1939 – 3 November 2005) was an Australian professional rugby league footballer.
A front-row forward with the St. George Dragons, he was a representative in the Australian national team in 1966 and from 1968 to 1970 earning six Test caps.
The Queensland Rugby League attempted to block his transfer to Sydney in 1967 forcing him to sit out the 1967 season and causing him to miss selection for the 1967 Kangaroo Tour.
He died of a heart attack while working on his farming property in Burren Junction west of Wee Waa, New South Wales aged 66.
His son, Jeff, played professionally in Australia and England.