1983 US Open – Men's singles

Defending champion Jimmy Connors defeated Ivan Lendl in a rematch of the previous year's final, 6–3, 6–7(2–7), 7–5, 6–0 to win the men's singles tennis title at the 1983 US Open. It was his fifth US Open singles title, eighth and last major singles title overall, and 100th ATP singles title overall.

This edition of the tournament set an Open Era record for the most five-set matches at a singles major, at 35. It was later surpassed by the 2024 Wimbledon Championships.

Seeds
The seeded players are listed below. Jimmy Connors is the champion; others show the round in which they were eliminated. • # 🇺🇸 John McEnroe (fourth round)

• # Ivan Lendl (finalist)

• # 🇺🇸 Jimmy Connors (champion)

• # 🇫🇷 Yannick Noah (quarterfinalist)

• # 🇸🇪 Mats Wilander (quarterfinalist)

• # 🇦🇷 Guillermo Vilas (third round)

• # n/a

• # 🇦🇷 José Luis Clerc (first round)

• # 🇺🇸 Jimmy Arias (semifinalist)

• # 🇪🇸 José Higueras (second round)

• # 🇺🇸 Gene Mayer (third round)

• # 🇺🇸 Johan Kriek (fourth round)

• # 🇺🇸 Steve Denton (third round)

• # 🇺🇸 Eliot Teltscher (quarterfinalist)

• # 🇺🇸 Vitas Gerulaitis (third round)

• # 🇺🇸 Bill Scanlon (semifinalist)