|Papua Province, Indonesia|
|Elevation||4,717 m (15,476 ft)|
|Prominence||460 m (1,510 ft)|
|First ascent||21 February 1962 by Heinrich Harrer and Philip Temple|
Ngga Pilimsit (or Mount Idenburg, its colonial name) is a mountain located in the Indonesian province of Papua, in the Maoke Mountains. It rises 4,717 meters (15,476 ft). It is a little over thirteen miles west-northwest of Puncak Jaya, the highest peak of Oceania and Indonesia. The nearest peaks are Carstensz Pyramid (Puncak Jaya), Wataikwa, Ubia, Venusberg, Otakwa, and Papua Peak 4061. Dependent on the definition used for an independent mountain, the peak ranks as the fourth to seventh highest mountain on New Guinea and in Indonesia.