Joel David Horton (born October 30, 1959) is an American lawyer and retired judge from Idaho. He is a former justice of the Idaho Supreme Court, appointed
Born in Nampa, Idaho, Horton lived in Lewiston as a youth and later in Boise; he graduated from Borah High School in Boise in 1977. He attended the University of Washington in Seattle and received a B.A. in political science in 1982. Horton then attended the University of Idaho in Moscow and received his J.D. from its College of Law
A district judge in Boise, Horton was appointed to the state's highest court by Governor Butch Otter in September 2007 to fill the vacancy of the retiring Linda Copple Trout. He narrowly retained his seat in the statewide election (50.1%) in but was re-elected by a wide margin (65.8%) six years later
In June 2018, Horton announced he would retire at the end of December. His successor, Gregory Moeller, was appointed by Otter and was unopposed in the 2020 election.