1977 U.S. Clay Court Championships – Men's singles

Manuel Orantes won the title for the third time, defeating Jimmy Connors in the final.

Seeds
A champion seed is indicated in bold text while text in italics indicates the round in which that seed was eliminated. • #🇺🇸 Jimmy Connors (final)

• #🇪🇸 Manuel Orantes (champion)

• #🇺🇸 Harold Solomon (quarterfinals)

• #🇵🇱 Wojciech Fibak (second round)

• #🇺🇸 Dick Stockton (quarterfinals)

• #🇺🇸 Eddie Dibbs (third round)

• # Jaime Fillol (third round)

• #🇦🇺 Phil Dent (semifinals)

• #🇬🇧 Buster Mottram (third round)

• # Željko Franulović (third round)

• #🇭🇺 Balázs Taróczy (semifinals)

• #🇺🇸 Cliff Richey (withdrew)

• #🇺🇸 Bill Scanlon (third round)

• #🇺🇸 Hank Pfister (first round)

• #🇦🇺 Dick Crealy (second round)

• #🇦🇺 Mark Edmondson (first round)