Deborah Ann Dingell (née Insley; November 23, 1953) is an American politician and member of the Democratic Party who has been the U.S. representative for Michigan's 6th congressional district since 2015 (known as the 12th congressional district until 2023). She is the widow of John Dingell, her predecessor in the seat, who holds the record as the longest-serving member of Congress in U.S. history. She worked as a consultant to the American Automobile Policy Council. She was a superdelegate for the 2012 Democratic National Convention in Charlotte, North Carolina.