| Usila | |
| States: | Mexico |
| Region: | Oaxaca, one town in Veracruz |
| Ethnicity: | Chinantecs |
| Speakers: | 7,400 |
| Date: | 2000 |
| Ref: | e18 |
| Familycolor: | American |
| Fam1: | Oto-Mangue |
| Fam2: | Western Oto-Mangue |
| Fam3: | Oto-Pame–Chinantecan |
| Fam4: | Chinantec |
| Iso3: | cuc |
| Glotto: | usil1237 |
| Glottorefname: | Usila Chinantec |
Usila is a Chinantec language of Mexico. It is most similar to Tlacoatzintepec Chinantec, with which it has 50% intelligibility (intelligibility in the reverse direction is 85%, presumably due to greater familiarity in that direction).[1]
Like other Chinantecan and Mazatec languages, Usila Chinantec is a tonal language noted for having whistled speech. Its tone system is unusually finely graded, however, with five register tones and four contour tones.[2]