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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).