John Robert Thompson III is a professional basketball coach and executive who has been the assistant coach for the United States men's national basketball team since 2017. He previously served as the head coach of the men's basketball team at Georgetown University. He grew up in Washington, D.C., and was named first team All-Metro by The Washington Post while playing for Gonzaga College High School in 1984. Thompson was hired on April 20, 2004, to replace Craig Esherick and was fired at the end of the 2017 season. Prior to being hired at Georgetown, Thompson was the head coach for four years at his alma mater, Princeton University. Thompson is the son of John Thompson Jr, Georgetown's head coach from 1972 to 1999, and is a 1988 graduate of Princeton University.

Gonzaga College High School is a private Catholic college-preparatory high school for boys in Washington, D.C. Founded by the Jesuits in 1821 as the Washington Seminary, Gonzaga is named in honor of Aloysius Gonzaga, an Italian saint from the 16th century. Gonzaga is the oldest boys' high school in Washington, D.C.