| Klaus-Dieter Bieler | |
| Nationality: | German |
| Sport: | Athletics |
| Club: | Eintracht Braunschweig TV Wattenscheid |
| Birth Date: | 1949 1, df=yes |
| Birth Place: | Braunschweig, Germany |
| Weight: | 77kg (170lb) |
| Pb: | 100 m – 10.32 (1976) |
Klaus-Dieter Bieler (born 5 January 1949) is a former German track and field athlete, who competed for West Germany in the 1976 Summer Olympics, taking part in the men's 100 metres and 4 × 100 metres relay events.[1]
Bieler competed for the clubs Eintracht Braunschweig and TV Wattenscheid.[2] His biggest success was winning the bronze medal in the 100 metres event at the 1974 European Athletics Championships.