Jerry Costello is the former U.S. Representative for Illinois’s 12th congressional district. He previously represented Illinois’s 21st congressional district, and served in Congress from 1988 to 2013.
He is a member of the Democratic Party and was the dean of Illinois’s 21-member congressional delegation. In October 2011, Costello announced that he would not seek another term in Congress in 2012. He was succeeded by William Enyart.