John J. Cullerton (born October 28, 1948) is an American politician who served as a Democratic member of the Illinois Senate, representing the 6th district from his appointment in 1991 to 2020. He served as President of the Illinois Senate from 2009 to 2020. On November 14, 2019 Cullerton announced to the other members of the Senate Democratic Caucus that he intended to retire in January 2020.