Waropen is an Austronesian language spoken at the Geelvink Bay of Indonesian Papua. It is fairly closely related to the Yapen languages (Austronesian).
Dialects are Waropen Kai, Napan, and Ambumi.
In Papua province, it is spoken in Mamberamo Raya Regency and Waropen Regency. The Ambumi dialect is spoken in the south Waropen Bay area. Waropen is also spoken southwest to the Rombak River mouth.