Aliena Schmidtke (born 20 November 1992) is a German swimmer.

She competed in the women's 100 metre butterfly event at the 2017 World Aquatics Championships.

Schmidtke earned a Bachelor of Science degree in molecular genetics and biology in Ohio State University.

Volunteered as a swim instructor with underprivileged children in the Columbus, Ohio area.

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