William H. Sorrell (born March 9, 1947) is an American politician. He is the longest-serving attorney general in the history of the U.S. state of Vermont, holding the position for 20 years. Originally appointed by Governor Howard Dean in 1997, he was reelected nine times: in 1998, 2000, 2002, 2004, 2006, 2008, 2010, 2012, and 2014. During his last election, he defeated primary challenger TJ Donovan by a very narrow margin. He did not run for re-election in 2016, and was succeeded by Donovan in January 2017.