The 1973 Queen's Club Championships was a tennis tournament played on grass courts at the Queen's Club in London in the United Kingdom.

The men's tournament was part of the 1973 Commercial Union Assurance Grand Prix circuit while the women's event was part of the 1973 Women's Grand Prix tour.

It was the 74th edition of the tournament and was held from 17 June until 23 June 1973.

Ilie Năstase and Olga Morozova won the singles titles.

Ilie Năstase defeated Roger Taylor 9–8, 6–3 Olga Morozova defeated Evonne Goolagong 6–2, 6–3 Tom Okker / Marty Riessen defeated Ray Keldie / Raymond Moore 6–4, 7–5 Rosie Casals / Billie Jean King defeated Françoise Dürr / Betty Stöve 4–6, 6–3, 7–5