The 1978 Queen's Club Championships was a men's tennis tournament played on outdoor grass courts at the Queen's Club in London in the United Kingdom that was part of the 1978 Colgate-Palmolive Grand Prix circuit. It was the 76th edition of the tournament and was held from 19 June through 24 June 1978. Tony Roche won the singles title.
Tony Roche defeated John McEnroe 8–6, 9–7
- It was Roche's 2nd title of the year and the 26th of his career.
Bob Hewitt / Frew McMillan defeated Fred McNair / Raúl Ramírez 6–2, 7–5
- It was Hewitt's 5th title of the year and the 50th of his career. It was McMillan's 5th title of the year and the 54th of his career.