1978 Wimbledon Championships – Mixed doubles

Bob Hewitt and Greer Stevens were the defending champions but did not compete.
Frew McMillan and Betty Stöve defeated Ray Ruffels and Billie Jean King in the final, 6–2, 6–2 to win the mixed doubles tennis title at the 1978 Wimbledon Championships.

Seeds

Frew McMillan / Betty Stöve
Ray Ruffels / Billie Jean King '
Geoff Masters / Virginia Wade '
Tony Roche / Françoise Dürr '
Marty Riessen / Wendy Turnbull '
Ross Case / Mona Guerrant '
Raz Reid / Kerry Reid '
Fred McNair / Lesley Hunt ''''