| Kosarek | |
| Nativename: | Kosarek Yale, Mek Kosarek |
| Ethnicity: | Yali people and Mek people |
| States: | Indonesia |
| Speakers: | 2,300 |
| Date: | 1993 |
| Ref: | e18 |
| Familycolor: | Papuan |
| Fam1: | Trans–New Guinea |
| Fam2: | Mek |
| Fam3: | Northern |
| Fam4: | Kosarek–Nipsan |
| Iso3: | kkl |
| Glotto: | kosa1249 |
| Glottorefname: | Kosarek Yale |
| Dia1: | Gilika (Kilika) |
Kosarek (or Kosarek Yale, Mek Kosarek) is a Papuan language used in Kosarek District, Yahukimo Regency, Highland Papua.[1]