Chelsey Heijnen (born 2 May 1999) is a Dutch amateur boxer who won a bronze medal at the 2022 World Championships.

[1][2] In 2019 she won the silver medal at the Strandja Cup in the 64 kg category.

[5] She competed at the 2022 IBA Women's World Boxing Championships in the light welterweight category and won the bronze medal.

[3] Heijnen studied at the Johan Cruyff College where she earned a spot in the "Wall of Fame" in May 2019 and received her diploma in July 2019.

Afterwards she started with a part-time study at the Academie voor Lichamelijke Opvoeding [nl].