Mitchell "Mitch" Kupchak (born May 24, 1954 in Hicksville, New York) is a retired American basketball player and current general manager of the Los Angeles Lakers since the 2000–01 NBA season after predecessor Jerry West moved to the Memphis Grizzlies organization.

Kupchak was an All-American on the North Carolina Tar Heels men's basketball team. Kupchak played on the gold medal winning team at the 1976 Summer Olympics in Montreal.

Kupchak was drafted by the Washington Bullets in 1976 and was named to the NBA All-Rookie Team. He had four productive seasons with Washington and was part of the team that won the NBA Championship in 1978. He signed a long term contract with the Lakers in 1981 on the behest of Earvin "Magic" Johnson, who told owner Jerry Buss, "If we could get Mitch Kupchak, I know we could win," after the team's playoff upset. Unfortunately, 26 games into the season, Kupchak injured his knee and did not play again until the 1983-84 season. However, Kupchak played a key role in the Lakers' 1985 championship team against the Boston Celtics, who had intimidated them in the prior year's Finals. Kupchak retired after the 1985-86 season, having played 510 regular season and 68 playoff games, with regular season averages of 10.2 points per game and 5.4 rebounds per game (7.7 points per game and 4.7 rebounds per game in the playoffs).