Henrik Rönnlöf Castegren (born 28 March 1996) is a Swedish professional footballer who plays as a defender for Allsvenskan club IK Sirius and the Sweden national team.
On 18 February 2022, Castegren signed a contract with Lechia Gdaà Âsk in Poland until 30 June 2024, with an option to extend. On 23 May 2023, following Lechia's relegation from Ekstraklasa, it was announced he would leave the club by mutual consent at the end of the month.
On 3 February 2025, Castegren signed a contract with Debreceni VSC in Hungary.
On 27 June 2025, Castegren went back to play for IK Sirius.