Stefan Nimke (born 1 March 1978 in Hagenow, Bezirk Schwerin) is an Olympic and world champion track cyclist from Germany.

At the 2000 Summer Olympics, he won the silver medal in the men's 1 km time trial, and was part of the German men's team that finished 7th in the men's team sprint.

At the 2004 Summer Olympics, he won the gold medal in the men's team sprint with Jens Fiedler and René Wolff, and won the bronze medal in the men's 1 km time trial.

At the 2008 Summer Olympics, he won the bronze medal in the men's team sprint, with Rene Enders and Maximillan Levy and finished in 9th place in the men's individual sprint.