Leonie Marlen Kullmann (born 26 August 1999) is a German swimmer.

She competed in the women's 4 × 200 metre freestyle relay event at the 2016 Summer Olympics.

[1] She is attending and competing in swimming at the University of Alabama.

[2] She qualified to represent Germany at the 2020 Summer Olympics.

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