John Joseph "Jack" Devlin (6 January 1900 – 26 May 1957) was an Australian politician. Born in New Zealand, he says he is from Violet Town, Victoria, he was educated at state schools before becoming a farmer. He served on Violet Town Shire Council from 1927 to 1957, and as President for some of that time. In 1946, he was elected to the Australian Senate as a Labor Senator for Victoria. He died in 1957; Charles Sandford was appointed to replace him.