John Ignatius Kane Sr. (born November 12, 1960) is an American politician and trade union leader. He is a Democratic member of the Pennsylvania State Senate, representing the 9th District since 2020. Kane trained as a plumber, stating that learning a trade gave his life direction. He later became the Business Manager of the Philadelphia Plumbers Local 690. Kane ran for state senate in 2014, against Thomas J. McGarrigle. During the campaign, Kane ran an advertisement about his wife and four children. This prompted his daughter from a previous relationship, Stella Holgerson, who had only met Kane once, to call him a liar.