Phou Khao Khouay National Park is a protected area in Laos.

[3] It has mountainous topography with elevation varying from 200 m – 1761 m. The area emerged from "uplifting and exposure of the underlying sedimentary (Indosinias schist-clay-sandstone) complex".

Extensive flat uplands with sandstones with hardly any soil cover are also part of the topography of the park.

Animals found in the park include elephants, tigers, bears, 13 pairs of white-cheeked gibbons, langurs, reptiles, amphibians and birds.

Sightings of the green peafowl have been reported near Ban Nakhay and Ban Nakhan Thoung, although it was generally once considered extinct in Laos.