John William (Jack) Narz, Jr. (November 13, 1922 – October 15, 2008) was an American television announcer and game show host. He was the brother of Tom Kennedy and the former brother-in-law of Bill Cullen.

Jack Narz hosted the 1970s syndicated version of Concentration after leaving his previous job hosting Beat the Clock and while he was hosting the Goodson-Todman wordsearch game show Now You See It.