The 1977 U.S. Clay Court Championships was a tennis tournament that was part of the men's Grand Prix and women's Colgate Series circuits. It was held in Indianapolis in the United States and played on outdoor clay courts at the Indianapolis Racquet Club.[1] It was the 9th edition of the tournament in the Open Era and was held from August 8 through August 14, 1977. Second-seeded Manuel Orantes won the men's singles title and the accompanying $17,500 first-prize money.[2]
See main article: 1977 U.S. Clay Court Championships – Men's singles. 
Manuel Orantes defeated 
Jimmy Connors 6–1, 6–3
See main article: 1977 U.S. Clay Court Championships – Women's singles. Laura duPont defeated Nancy Richey 6–4, 6–3
See main article: 1977 U.S. Clay Court Championships – Men's doubles. Patricio Cornejo / Jaime Fillol defeated 
Dick Crealy / Cliff Letcher 6–7, 6–4, 6–3
See main article: 1977 U.S. Clay Court Championships – Women's doubles. Linky Boshoff / Ilana Kloss defeated Mary Carillo / Wendy Overton 5–7, 7–5, 6–3