1966 Wimbledon Championships – Mixed doubles
| Mixed doubles | |
|---|---|
| 1966 Wimbledon Championships | |
| Champions | Ken Fletcher Margaret Smith |
| Runners-up | Dennis Ralston Billie Jean King |
| Score | 4–6, 6–3, 6–3 |
| Draw | 80 (5 Q ) |
| Seeds | 4 |
Ken Fletcher and Margaret Smith successfully defended their title, defeating Dennis Ralston and Billie Jean King in the final, 4–6, 6–3, 6–3 to win the mixed doubles tennis title at the 1966 Wimbledon Championships.