Mari Romundset Nilsen (born 7 October 2003) is a Norwegian taekwondo practitioner.

[2] She was runner-up to Britain's Chloe Roberts at the 2022 European Club Championships in Estonia.

[3] She made her senior international debut at the 2022 European Taekwondo Championships in Manchester.

[2] In February 2023, she was runner up at the Olympic qualifying event in Istanbul, losing in the final against the Belgian world champion Sarah Chaâri.

[5] She won the bronze medal in the Women’s Welterwight division at the 2023 World Taekwondo Championships.