John Joseph Madigan (born 21 July 1966) is a former Australian politician.
He was a member of the Democratic Labour Party (DLP), before resigning from the party and becoming an independent in September 2014.
Madigan launched the John Madigan's Manufacturing and Farming Party in 2015.
He was elected to the Australian Senate with 2.3 percent of the primary vote in Victoria at the 2010 federal election, to serve a six-year term from July 2011.
He failed to be re-elected at the 2016 double dissolution election, and the Manufacturing and Farming Party was voluntarily deregistered on 13 September 2016.
Madigan joined the Australian Country Party in September 2016.