Mats Köhlert (born 2 May 1998) is a German footballer who plays as a left winger for Dutch side Willem II.
In 2016, Köhlert signed his first professional contract with Hamburger SV. He made his professional debut for Hamburg in the 2. Bundesliga on 30 March 2019, coming on as a substitute in the 78th minute for Vasilije Janjičić in the 0–0 away draw against VfL Bochum. On 1 July Köhlert signed a contract at Eredivisie side Willem II after his contract at Hamburger SV had expired.
In 2015, Köhlert was included in Germany's squad for the 2015 UEFA European Under-17 Championship in Bulgaria. He made four appearances in the tournament, with the team managing to reach the final before losing 1–4 to France. However, the team still managed to qualify for the 2015 FIFA U-17 World Cup in Chile, with Köhlert subsequently included in Germany's squad. He appeared in all four of Germany's matches, with the team being eliminated in the round of 16 after a 0–2 defeat to Croatia.