The 1972 Washington Star International – Singles was an event of the 1972 Washington Star International tennis tournament and was played in Washington, D.C., United States from July 17 through July 23, 1972.

The draw comprised 64 players.

Ken Rosewall was the defending champion but did not compete in this edition.

Tony Roche won the singles title, defeating Marty Riessen in the final, 3–6, 7–6, 6–4.

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