Chinle High School is a high school (grades 9 to 12) in Chinle, an unincorporated area of Apache County, Arizona, United States.
The school, which serves grades 9 through 12, is a part of the Chinle Unified School District. Chinle High School serves several unincorporated areas Apache County, including Chinle, Lukachukai, Many Farms, Rough Rock, Tsaile, and some areas considered to be Nazlini. The areas the school serves are within the Navajo Nation.
In 2005, Chinle had some 1,155 students and 75 teachers. 99% of the students are Native Americans, mainly Navajo as it is part of the Navajo Nation.
The school, like others in the district, has been troubled by gang activity. In 2003, a display of weapons confiscated from students included baseball bats, knives, nunchucks and brass knuckles. 
All Chinle USD elementary schools, middle schools, and K-8 schools feed into Chinle High School.
36°09′25″N 109°34′56″W / 36.157074°N 109.582272°WCoordinates: 36°09′25″N 109°34′56″W / 36.157074°N 109.582272°W