Jannik Mause (born 11 July 1998) is a German professional footballer who plays as a forward for 3. Liga club Rot-Weiss Essen on loan from 1. FC Kaiserslautern.

Mause joined the youth academy of German Bundesliga side Mainz 05 at the age of nineteen.

In 2019, Mause signed for German side Steinbach Haiger. In 2020, he signed for German side SV Rödinghausen. In 2021, he signed for German side FC Wegberg-Beeck. After that, he signed for German side Alemannia Aachen. In 2023, he signed for German side FC Ingolstadt. He was regarded as one of the club's most important players.

In July 2024, Mause signed for 2. Bundesliga club 1. FC Kaiserslautern.

On 28 January 2025, Mause was loaned to Greuther Fürth in 2. Bundesliga. On 29 August 2025, Mause moved on a new loan to Rot-Weiss Essen in 3. Liga.

Mause has represented Germany internationally at youth level.

Mause mainly operates as a striker.

Mause's parents have lived in North Rhine-Westphalia, Germany.