Huarijio (Huarijío in Spanish; also spelled Guarijío, Varihío, and Warihío) is a Uto-Aztecan language of the states of Chihuahua and Sonora in northwestern Mexico.

The river variant is found in the Sonoran municipalities of Álamos (settlements of Bavícora, Burapaco, Casas Coloradas, Chorijoa, El Chalate, El Sauz, Guajaray, Huataturi, Jobeg I, La Sauceda, La Tribuna, Los Estrados, Mesa Colorada, Mochibampo, Ranch Nuevo, San Bernardo, Sejaqui, and Tecoripa) and Quiriego (settlements of Batacosa, El Frijolar, Los Bajíos (Ejido los Conejos), and Quiriego).

Contact between the two groups is scant and, although the linguistic differences between the two are slight, speakers report that mutual comprehension is difficult.

Guarijio is an agglutinative language, where words are morphologically complex to accomplish various grammatical purposes, i.e. several morphemes are strung together.

Programming in Guarijio is carried by the CDI's radio station XEETCH, broadcasting from Etchojoa, Sonora.