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

Kathy May was the defending champion but was upset in her first match against Mary Hamm. Third-seed Laura duPont won the title beating Nancy Richey 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. • #🇺🇸 Kathy May (first round)

• #🇺🇸 Janet Newberry (first round)

• #🇺🇸 Laura duPont (champion)

• # Yvonne Vermaak (second round)

• # Brigitte Cuypers (first round)

• #🇦🇺 Lesley Hunt (first round)

• #🇺🇸 Kathy Kuykendall (second round)

• #🇺🇸 Pam Teeguarden (first round)