Eva Karin Nyberg (born 8 February 1969 in Funbo, Uppsala) is a former Swedish Olympic freestyle swimmer.

Her best individual result is 19th place in the 100 m freestyle in 1992.

She also swum a final with the 1992 4×100 m freestyle relay team finishing 7th.

Nyberg represented Mariestads SS and Malmö KK.

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