Leon Klassen (Russian: Леон Классен; born 29 May 2000) is a professional footballer who plays as a left-back for Danish Superliga club Lyngby.

Liga for 1860 Munich on 31 July 2019, coming on as a substitute in the 87th minute for Benjamin Kindsvater against FSV Zwickau.

He assisted Herbert Paul for Munich's third goal, with the match finishing as a 3–0 home win.

[4] On 30 December 2021, he signed a 3.5-year contract with Russian Premier League club FC Spartak Moscow.

This biographical article related to association football in Germany, about a defender born in the 1990s, is a stub.