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For the 2025-26 school year, there are 5 public high schools serving 315 students in Valley County, MT.

The top ranked public high schools in Valley County, MT are Nashua High School, Hinsdale High School and Frazer High School. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.

Valley County, MT public high schools have an average math proficiency score of 31% (versus the Montana public high school average of 32%), and reading proficiency score of 46% (versus the 43% statewide average). High schools in Valley County have an average ranking of 6/10, which is in the top 50% of Montana public high schools.

Valley County, MT public high school have a Graduation Rate of 78%, which is less than the Montana average of 83%.

The school with highest graduation rate is Glasgow High School, with ≥90% graduation rate. Read more about public school graduation rate statistics in Montana or national school graduation rate statistics.

Minority enrollment is 22% of the student body (majority American Indian), which is less than the Montana public high school average of 23% (majority American Indian).