Jannes-Kilian Horn (born 6 February 1997) is a German professional footballer who plays as a left-back for Major League Soccer club St. Louis City on loan from 1.

[3][4] Horn spent his youth career at VfL Wolfsburg, where he was promoted to the first team during the 2016–17 season.

[6] On 15 August 2019, Horn joined Hannover 96 on a loan deal until the end of 2019–20 season.

[11] On 2 August 2024, Horn moved on loan to St. Louis City until 30 June 2025, with an option to buy.

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