Olaf Prenzler (born 2 April 1958) is an East German former sprinter who specialised in the 100 and 200 metres.
In the 4 × 100 metres relay he won a silver medal with teammates Thomas Munkelt, Detlef Kübeck and Frank Emmelmann.
At the 1986 European Championships he finished sixth in 100 m and seventh in 200 m. He then won another silver medal in the 4 × 100 metres relay with teammates Thomas Schröder, Steffen Bringmann and Frank Emmelmann.
He represented the sports team SC Magdeburg and became East German champion in 1978 (200 m), 1979 (100 m) and 1983 (200 m).
[2] In July 1982 he helped established an East German relay record with 38.28 seconds.