| Ernst Diehl | |
| Birth Date: | 1949 3, df=yes |
| Birth Place: | Etschberg, Germany |
| Position: | Defender |
| Years1: | 1967–1978 |
| Clubs1: | 1. FC Kaiserslautern |
| Caps1: | 314 |
| Goals1: | 18 |
| Manageryears1: | 1983 |
| Managerclubs1: | 1. FC Kaiserslautern |
Ernst Diehl (born 28 March 1949 in Etschberg) is a retired German football player and coach. As a player, he spent 11 seasons in the Bundesliga with 1. FC Kaiserslautern.[1]