Ivan John Petch (born 1 March 1939) is a former Australian politician. Petch was a member of the New South Wales Legislative Assembly representing the electorate of Gladesville for the Liberal Party between 1988 and 1995. He served as a Councillor for the Ryde City Council including a term as Mayor between 2012 and 2013 before a finding of corrupt conduct by the Independent Commission Against Corruption, forcing his resignation from Council in 2014.