The Ohlone languages, also known as Costanoan, form a small Indigenous language family historically spoken in Northern California, both in the southern San Francisco Bay Area and northern Monterey Bay area, by the Ohlone people. Along with the Miwok languages, they are members of the Utian language family. The most recent work suggests that Ohlone, Miwok, and Yokuts are branches of a Yok-Utian language family.
Utian (also Miwok–Costanoan, Miwok–Ohlone or formerly Mutsun) is a family of Indigenous languages spoken in Northern California, United States. The Miwok and Ohlone peoples both spoke languages of the Utian language family. It has been argued that the Utian languages and Yokuts languages are sub-families of the Yok-Utian language family. Utian and Yokutsan have traditionally been considered part of the Penutian language phylum.
All Utian languages are severely endangered, extinct or revitalizing.