Grant Andrew Long (born March 12, 1966) is a retired American professional basketball player. He played over 1,000 NBA games over a 15-year career.

A 6'9" forward from Eastern Michigan University, Long was selected with the 33rd pick of the 1988 NBA Draft by the Miami Heat. Long played six seasons for the Heat, earning a reputation for his aggressive defense and strong rebounding. After the first two games of the 1994-95 season, Long was traded to the Atlanta Hawks along with Steve Smith for Kevin Willis. Long played two separate stints with the Hawks (1994-1996) and (1998-99); he would also play for the Detroit Pistons, Vancouver and Memphis Grizzlies, and Boston Celtics, and he ended his NBA career in 2003 with 9,518 total points and 6,154 total rebounds.

Long had two relatives who were playing in the NBA during his tenure in the league: John Long, his uncle, and Terry Mills, his cousin. He and Mills were teammates on the Detroit Pistons during the 1996-97 season.

His brother is professional boxer Julius Long.