List of endangered languages in Indonesia
An endangered language is a language that it is at risk of falling out of use, generally because it has few surviving speakers. If it loses all of its native speakers, it becomes an extinct language. UNESCO defines four levels of language endangerment between "safe" and "extinct":
| Language | Speakers | Status | Comments | Ref |
| Alune language | | Vulnerable | Alune people | |
| Amahai language | | Critically endangered | | |
| Ampibabo Lauje language | | Vulnerable | | |
| Andio language | | Vulnerable | | |
| Anus language | | Severely endangered | Korur language | |
| Aputai language | | Critically endangered | Wetarese languages | |
| Arguni language | | Vulnerable | | |
| As language | | Vulnerable | Raja Ampat languages | |
| Auye language | | Vulnerable | | |
| Awera language | | Vulnerable | | |
| Awyi language | | Vulnerable | | |
| Bahonsuai language | | Definitely endangered | | |
| Baleasang language | | Definitely endangered | | |
| Baras language | | Severely endangered | | |
| Bedoanas language | | Vulnerable | | |
| Benggoi language | | Definitely endangered | | |
| Besoa language | | Vulnerable | Badaic language | |
| Biak language | | Vulnerable | | |
| Boano language | | Vulnerable | | |
| Bonerif language | | Critically endangered | Beneraf language | |
| Bonggo language | | Severely endangered | | |
| Budong-Budong language | | Critically endangered | | |
| Burate language | | Severely endangered | | |
| Busoa language | | Vulnerable | | |
| Dabra language | | Vulnerable | | |
| Dakka language | | Vulnerable | | |
| Damal language | | Vulnerable | Amung language | |
| Dampelas language | | Definitely endangered | | |
| Demisa language | | Definitely endangered | | |
| Dondo language | | Vulnerable | | |
| Doutai language | | Severely endangered | | |
| Dubu language | | Vulnerable | Tebi language | |
| Duriankere language | | Critically endangered | | |
| Dusner language | | Critically endangered | | |
| Emplawas language | | Definitely endangered | | |
| Enggano language | | Vulnerable | | |
| Erokwanas language | | Vulnerable | | |
| Fayu language | | Vulnerable | | |
| Foya language | | Critically endangered | Foja Mountains | |
| Gebe language | | Vulnerable | | |
| Gorap language | | Definitely endangered | | |
| Helong language | | Severely endangered | | |
| Hoti language | | Critically endangered | | |
| Hulung language | | Critically endangered | | |
| Ibu language | | Critically endangered | | |
| Iresim language | | Severely endangered | | |
| Isirawa language | | Vulnerable | | |
| Itik language | | Vulnerable | | |
| Javindo Creole language | | Critically endangered | | |
| Kadai language | | Definitely endangered | | |
| Kaibobo language | | Definitely endangered | | |
| Kaiy language | | Vulnerable | | |
| Kalao language | | Definitely endangered | | |
| Kamarian language | | Critically endangered | | |
| Kao language | | Definitely endangered | | |
| Kapori language | | Critically endangered | | |
| Karas language | | Severely endangered | | |
| Kayupulau language | | Critically endangered | | |
| Keder language | | Severely endangered | | |
| Kembra language | | Critically endangered | | |
| Kodeoha language | | Vulnerable | | |
| Kofei language | | Severely endangered | | |
| Koneraw language | | Vulnerable | | |
| Koroni language | | Definitely endangered | | |
| Kowiai language | | Vulnerable | | |
| Kwansu language | | Vulnerable | | |
| Kwerisa language | | Critically endangered | | |
| Laiyolo language | | Definitely endangered | | |
| Lauje language | | Vulnerable | | |
| Legenyem language | | Vulnerable | | |
| Lemolang language | | Vulnerable | | |
| Lengilu language | | Critically endangered | | |
| Liki language | | Critically endangered | | |
| Lisela language | | Vulnerable | | |
| Lola language | | Vulnerable | | |
| Lolak language | | Critically endangered | | |
| Lom language | | Critically endangered | Bangka Malay | |
| Loun language | | Critically endangered | | |
| Mander language | | Critically endangered | | |
| Mansim language | | Critically endangered | | |
| Maremgi language | | Definitely endangered | | |
| Massep language | | Critically endangered | | |
| Momuna language | | Vulnerable | | |
| Mor language | | Severely endangered | | |
| Moraori language | | Severely endangered | Morori language | |
| Napu language | | Vulnerable | Badaic language | |
| Narau language | | Severely endangered | | |
| Nila language, Nila | | Definitely endangered | | |
| Nusa Laut language | | Critically endangered | | |
| Obokuitai language | | Vulnerable | | |
| Oirata language | | Definitely endangered | | |
| Onin language | | Vulnerable | | |
| Ormu language | | Vulnerable | | |
| Padoe language | | Vulnerable | | |
| Palu'e language | | Definitely endangered | | |
| Panasuan language | | Definitely endangered | | |
| Paulohi language | | Critically endangered | | |
| Pauwi language | | Vulnerable | | |
| Peco' Creole language | | Critically endangered | | |
| Pendau language | | Vulnerable | | |
| Pyu language | | Severely endangered | | |
| Rahambuu language | | Vulnerable | | |
| Salas language | | Severely endangered | | |
| Saluan language | | Vulnerable | | |
| Saparua language | | Definitely endangered | | |
| Saponi language | | Critically endangered | | |
| Sause language | | Severely endangered | | |
| Senggi language | | Vulnerable | | |
| Serili language | | Vulnerable | | |
| Sobei language | | Definitely endangered | | |
| Taba language | | Vulnerable | | |
| Taikat language | | Definitely endangered | | |
| Taje language | | Critically endangered | | |
| Tajio language | | Vulnerable | | |
| Taloki language | | Definitely endangered | | |
| Talondo language | | Definitely endangered | | |
| Tarpia language | | Severely endangered | | |
| Tause language | | Vulnerable | | |
| Taworta language | | Vulnerable | | |
| Te'un language | | Definitely endangered | | |
| Tialo language | | Vulnerable | | |
| Tobati language | | Severely endangered | | |
| Tofanma language | | Vulnerable | | |
| Tomadino language | | Definitely endangered | | |
| Tombelala language | | Vulnerable | | |
| Toratán language | | Definitely endangered | | |
| Totoli language | | Vulnerable | | |
| Uhunduni language | | Vulnerable | | |
| Ujir language | | Definitely endangered | | |
| Usku language | | Critically endangered | | |
| Wano language | | Definitely endangered | | |
| Wari language | | Definitely endangered | | |
| Waru language | | Definitely endangered | | |
| Woria language | | Critically endangered | | |
| Wotu language | | Vulnerable | | |
| Yoki language | | Severely endangered | | |
