The 1977 Washington Star International was a men's tennis tournament and was played on outdoor clay courts in Washington, D.C., USA. It was part of the 1977 Grand Prix circuit and categorized as a 4 star event. It was the 9th edition of the tournament and was held in Washington, D.C. from July 18 through July 25, 1977. First-seeded Guillermo Vilas won the singles title, his second after 1975, and earned the $20,000 first-prize money. The singles final was delayed for two hours due to rain.[3][4]
