| Dieter Mietz | |
| Birth Date: | 3 September 1943 |
| Birth Place: | Olsztyn, Poland |
| Height: | 1.76 m |
| Position: | Defender |
| Years1: | 1966–1971 |
| Clubs1: | SG Wattenscheid 09 |
| Years2: | 1971–1972 |
| Clubs2: | Borussia Dortmund |
| Caps2: | 29 |
| Goals2: | 0 |
| Years3: | 1972–1974 |
| Clubs3: | Sportfreunde Siegen |
| Nationalteam1: | West Germany |
Dieter Mietz (born 3 September 1943) is a German former footballer who played as a defender. He competed for West Germany in the men's tournament at the 1972 Summer Olympics.[1]