| Date: | July 23–29 |
| Edition: | 5th |
| Category: | Grand Prix (Grade A) |
| Prize Money: | $75,000 |
| Draw: | 64S / 32D |
| Surface: | Clay / outdoor |
| Location: | Washington, D.C., United States |
| Venue: | Washington Tennis Stadium |
| Champs: |  Arthur Ashe[1] |
| Champd: |  Ross Case / Geoff Masters[2] |
| Main Name: | Washington Open (tennis) Washington Open |
The 1973 Washington Star International was a men's tennis tournament that was played on outdoor clay courts at the Washington Tennis Stadium in Washington, D.C. The event was categorized as a Grade A tournament and was part of the 1973 Grand Prix circuit. It was the fifth edition of the tournament and was held from July 23 through July 29, 1973, and was the first event on the US Tour leading up to the 1973 US Open. Third-seeded Arthur Ashe won the singles title and $11,000 prize money.[3]
Arthur Ashe defeated Tom Okker 6–4, 6–2
Ross Case / Geoff Masters defeated Dick Crealy / Andrew Pattison 2–6, 6–4, 6–4