James Arthur Boeheim Jr. (/ˈbeɪhaɪm/ BAY-hyme; born November 17, 1944) is an American former college basketball coach and current Special Assistant to the Athletic Director at Syracuse University. From 1976 until 2023, he was the head coach of the Syracuse Orange men's team of the Atlantic Coast Conference (ACC). Boeheim guided the Orange to ten Big East Conference regular season championships, five Big East tournament championships, and 34 NCAA tournament appearances, including five Final Four appearances and three appearances in the national title game. In those games, the Orangemen lost to Indiana in 1987, and to Kentucky in 1996, before defeating Kansas in 2003 with All-American Carmelo Anthony.

Boeheim has served as the President of the National Association of Basketball Coaches (NABC), chairman of the USA Basketball committees, and on various board of directors. He served as an assistant coach for the United States men's national basketball team at the Summer Olympics (2008, 2012, 2016) and the FIBA World Championships (1990, 2006, 2010). Boeheim was inducted into the Basketball Hall of Fame in September 2005.

Boeheim intended to retire in 2018 but departure of expected successor Mike Hopkins for the head coaching position at Washington would keep him at Syracuse until his eventual retirement in 2023. During the 2021–22 season Boeheim coached both of his sons, Jimmy and Buddy Boeheim. Boeheim would become the winningest active coach in Division I basketball on April 2, 2022, after the retirement of Mike Krzyzewski. As a result of the Syracuse athletics scandal in 2015, the NCAA vacated 101 of his wins.

After suffering from cancer in 2001, Boeheim founded with his wife the Jim and Juli Boeheim Foundation, which is devoted to child welfare, cancer treatment, and prevention.

Boeheim was born in 1944 in a German-American family to parents Janet and James Boeheim Sr. in Lyons, New York, a small town about 57 miles west of Syracuse. His family owned a funeral home, started by his great-grandfather in the mid-1800s. He graduated from Lyons Central High School, where he starred for coach Dick Blackwell's team.

Boeheim enrolled in Syracuse University as a student in 1962, and graduated with a bachelor's degree in social science. During his freshman year, Boeheim was a walk-on with the freshman basketball team. By his senior year, he was the varsity team captain and a teammate of All-American Dave Bing, his freshman roommate. The pair led coach Fred Lewis's Orangemen to a 22–6 overall win–loss record that earned the team's second-ever NCAA tournament berth. While at Syracuse, he joined the Delta Upsilon fraternity. He played as a student at SU for two seasons and in 1970s served as the university's last golf coach.

After graduating from Syracuse, Boeheim played professionally with the Scranton Miners of the Eastern Professional Basketball League, during which he won two championships and was a second-team all-star. While working as a graduate assistant, he earned a graduate degree from Syracuse in 1973.

In 1969, Boeheim decided to coach basketball and was hired as a graduate assistant at Syracuse under Roy Danforth. Soon thereafter he was promoted to a full-time assistant coach and was a member of the coaching staff that helped guide the Orangemen to the 1975 NCAA tournament, where Syracuse University made its first Final Four appearance.