Martina Grunert (later Koch then Abresch; born 17 May 1949 in Leipzig) is a retired German swimmer who participated in the 1964 and 1968 Summer Olympics.

As a part of the 4 × 100 m freestyle relay team she was sixth in 1964 and won a silver medal in 1968.

Her best individual achievement was fifth place in 100 m freestyle in 1968.

[1] She also won two gold medals in the European Aquatics Championships: 100 m freestyle (1966) and 200 m medley (1970).

This biographical article related to a German swimmer is a stub.