Tanja Kylliäinen (born 30 January 1993) is a Finnish swimmer.

She competed in the women's 400 metre individual medley event at the 2016 Summer Olympics.

[1] Kylliäinen was born in Baltimore, Maryland to an American mother and a Finnish father.

She has lived her whole life in the United States and speaks only a few words of Finnish.

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