Chinle High School is a high school (grades 9 to 12) in Chinle, an unincorporated area of Apache County, Arizona, United States. The school is the only high school in the Chinle Unified School District, and all of the district's elementary and middle schools feed into it. Chinle High School serves several unincorporated areas in Apache County, including Chinle, Lukachukai, Many Farms, Rough Rock, Tsaile, and some areas considered to be Nazlini.