In this link, there is an interactive map of the indigenous population according to the Chilean 2017 Census and you can see the largest indigenous group in each comuna. "Other" are people who identify with an indigenous people not legally recognized (The main example being Changos in Taltal, who only were recognized last year)
https://www.emol.com/noticias/Nacional/2018/05/05/905013/Mapa-Camina-Alto-Biobio-y-Colchane-son-las-comunas-con-un-porcentaje-mayor-de-poblacion-de-pueblos-originarios.html
