The 1984–85 Georgetown Hoyas men's basketball team represented Georgetown University in the 1984–85 NCAA Division I college basketball season. John Thompson, coached them in his 13th season as head coach. They played their home games at the Capital Centre in Landover, Maryland. They were members of the Big East Conference and finished the season with a record of 35-3, 14-2 in Big East play. They won the 1985 Big East men's basketball tournament and advanced to the final of the 1985 NCAA Division I men's basketball tournament, which they lost to Big East rival Villanova in what is widely regarded as one of the greatest upsets in college basketball history. They were ranked No. 1 in the season's final Associated Press Poll and Coaches' Poll.

John Robert Thompson Jr. was an American college basketball coach for the Georgetown Hoyas men's team. He became the first African-American head coach to win a major collegiate championship in basketball when he led the Hoyas to the NCAA Division I national championship in 1984. Thompson was inducted into the Naismith Memorial Basketball Hall of Fame and National Collegiate Basketball Hall of Fame.