Greyhills Academy High School

Greyhills Academy High School is a Native American boarding high school (grades 9–12) in Tuba City, Arizona on the Navajo Nation. It is operated by the Western Navajo Agency, a tribal agency working in affiliation with the Bureau of Indian Education (BIE), which funds the school.

A radio station, KGHR 91.3 FM, is associated with the school.

The school has a dormitory and has boarding students.