The Washington Indoor was a men's tennis tournament played in Washington D.C., except for the 1973 edition which was held in Merrifield, Virginia and the 1974–75 editions which were held in Landover, Maryland. The inaugural edition was part of the USLTA Indoor and Grand Prix circuits. It was played as part of the World Championship Tennis (WCT) circuit from 1973 until 1976 and the Grand Prix circuit from 1977 until 1980. The event was played on indoor carpet courts. Brian Gottfried was the only multiple singles champion, winning the title in 1977 and 1978.

Finals

Singles

Year	Champions	Runners-up	Score
1972	Stan Smith	Jimmy Connors	4–6, 6–1, 6–3, 4–6, 6–1
1973	Tom Okker	Arthur Ashe	6–3, 6–7(4–7), 7–6(7–3)
1974	Ilie Năstase	Tom Okker	6–3, 6–3
1975	Mark Cox	Dick Stockton	6–2, 7–6
1976	Harold Solomon	Onny Parun	6–3, 6–1
1977	Brian Gottfried	Robert Lutz	6–1, 6–2
1978	Brian Gottfried	Raúl Ramírez	7–5, 7–6(7–4)
1979	Roscoe Tanner	Brian Gottfried	6–4, 6–4
1980	Victor Amaya	Ivan Lendl	6–7(5–7), 6–4, 7–5

Doubles

Year	Champions	Runners-up	Score
1972	Tom Edlefsen Cliff Richey	Clark Graebner Thomaz Koch	6–4, 6–3
1973	Tom Okker Marty Riessen	Arthur Ashe Roscoe Tanner	4–6, 7–6, 6–2
1974	Bob Hewitt Frew McMillan	Tom Okker Marty Riessen	7–6, 6–3
1975	Mike Estep Jeff Simpson	Anand Amritraj Vijay Amritraj	7–6, 6–3
1976	Eddie Dibbs Harold Solomon	Mark Cox Cliff Drysdale	6–4, 7–5
1977	Robert Lutz Stan Smith	Brian Gottfried Raúl Ramírez	6–3, 7–5
1978	Robert Lutz Stan Smith	Arthur Ashe John McEnroe	6–7, 7–5, 6–1
1979	Robert Lutz Stan Smith	Bob Carmichael Brian Teacher	6–4, 7–5, 3–6, 7–6
1980	Brian Teacher Ferdi Taygan	Kevin Curren Steve Denton	4–6, 6–3, 7–6