Jennifer Klein (born 11 January 1999) is an Austrian footballer who plays as a midfielder for SKN St. Pölten in the ÖFB-Frauenliga.

Klein was also part of the squad who represented Austria at the 2016 UEFA Women's Under-17 Championship qualification.

In the 2018 UEFA Women's Under-19 Championship qualification, she also played three matches and scored one goal.

On 1 July 2017, Klein was included by coach Dominik Thalhammer in the 23-women squad who represented Austria at the UEFA Women's Euro 2017.

On 23 November 2017, Klein made her debut for Austria in a qualification match for the 2019 FIFA Women's World Cup against Israel.