Siebe Van der Heyden (born 30 May 1998) is a Belgian professional footballer who plays as a centre back for German Bundesliga club St. Pauli on loan from the Spanish side Mallorca, and the Belgium national team.

[4][5][6] Van der Heyden made his Belgian First Division A debut for Oostende on 21 May 2017 against Anderlecht, coming on as a substitute in the 88th minute for David Rozehnal.

[7] Van der Heyden struggled to break into the first team however, and was released at the end of his contract in 2018.

[16] On 19 July 2023, Van der Heyden signed a five-year contract with La Liga side Mallorca.

[17] On 30 January 2025, Van der Heyden joined St. Pauli in Germany on loan until the end of the 2024–25 season.