The 1977 U.S. Pro Indoor was a men's tennis tournament played on indoor carpet courts that was part of the World Championship Tennis (WCT) circuit. It was played at the Spectrum in Philadelphia, Pennsylvania in the United States. It was the 10th edition of the tournament and was held from January 24 through January 30, 1977. Dick Stockton, who was seeded 12th, won the singles title while Bob Hewitt and Frew McMillan won the men's doubles. Total attendance for the tournament was 81,798.
Finals
Singles
Dick Stockton defeated Jimmy Connors 3–6, 6–4, 3–6, 6–1, 6–2
It was Stockton's 1st title for that year and the 13th of his career.
Doubles
Bob Hewitt / Frew McMillan defeated Wojciech Fibak / Tom Okker 6–1, 1–6, 6–3
It was Hewitt's 1st title for that year and the 31st of his career. It was McMillan's 1st title of the year and the 36th of his career.