The Star Mountains (Dutch (colonial): Sterrengebergte; Indonesian: Pegunungan Bintang) are a mountain range in eastern end of Highland Papua, Indonesia and the western Papua New Guinea, stretching from the eastern end of Indonesia to the Hindenburg Range in Papua New Guinea.

The earlier Western expedition to the mountains was led by Jan Sneep, a Dutch colonial civil servant who operated from the Sibil Valley.

The expedition, which started in April 1959, mapped the terrain and collected anthropological data of the people who lived in the area.

[1] The Star Mountains have an annual rainfall of more than 10,000 mm/year, and although no official scientific weather station has ever been established it has been claimed to be one of the wettest places on earth.

[2] In terms of the number of independent language families, the Star Mountains are one of the most linguistically diverse regions in New Guinea.