Khun Nan National Park (Thai: อุทยานแห่งชาติขุนน่าน) is a protected area on the western side of the Luang Prabang Range in the Thailand-Laos border area, on the Thai side of the ridge.

It is named after Khun Nan subdistrict (tambon) of Chaloem Phra Kiat District of Nan Province and includes parts located in Bo Kluea District.

[2] Khun Nan National Park is part of the Luang Prabang montane rain forests ecoregion.

Other waterfalls within the perimeter of the park are Huai Ti and Ban Den.

1,745 m high Doi Phi Pan Nam is the tallest peak within the park.