sentences:  McKinley County is one of only 38 county-level census divisions of the United States where the most spoken language is not English and one of only 3 where it is neither English nor Spanish.45.75% of the population speak Navajo at home, followed by English at 38.87%, Zuñi at 9.03%, and Spanish at 5.72%.As of the 2010 census, there were 71,492 people, 21,968 households, and 16,219 families living in the county.