| Tandia | |
| Region: | West Papua |
| States: | Indonesia |
| Extinct: | by 2024 |
| Ref: | e16 |
| Familycolor: | Austronesian |
| Fam2: | Malayo-Polynesian |
| Fam3: | Central–Eastern Malayo-Polynesian |
| Fam4: | Eastern Malayo-Polynesian |
| Fam5: | South Halmahera–West New Guinea |
| Iso3: | tni |
| Linglist: | tni.html |
| Glotto: | tand1253 |
| Glottorefname: | Tandia |
Tandia is an extinct Austronesian language in the putative Cenderawasih (Geelvink Bay) family of Indonesian Papua. Most speakers have shifted to Wandamen. In 1991, there were only two speakers of Tandia in the world, who they both lived just south of the Wohsimi River on the Wandamen Peninsula, Irian Jaya Province, Indonesia.[1] It was confirmed to be a living language in 2009, but by 2024, it was found to have gone extinct by a linguistic survey team.[2]