Grangeville High School

Grangeville High School is a public high school in Grangeville, Idaho, serving 244 students in grades 9–12 as part of the Mountain View School District. The school has built a strong reputation for academic achievement in English Language Arts and Science, with proficiency rates that far surpass both district and state averages in recent years.

In the 2024–2025 school year, Grangeville posted an 82.9% ELA proficiency rate and a 73.8% Science proficiency rate, compared with state averages of 53.9% and 42.6% respectively. That performance helped Grangeville earn a 7th-place state ranking, but in 2025–2026 the school dropped to 39th out of 122 Idaho high schools, a decline that may reflect changes in ranking methodology or missing math test data rather than a sudden drop in achievement. Within its district, Grangeville is the clear academic leader: Clearwater Valley Junior/Senior posted much lower proficiency rates and ranks 89th in the state despite spending more per student and having smaller class sizes. Nearby Prairie Junior/Senior High School is a stronger competitor, ranking 19th in the state with notably strong math performance and very low chronic absenteeism.

Grangeville has also made impressive gains outside of test scores. Chronic absenteeism fell from 28.5% in 2022–2023 to 12.5% in 2025–2026, now below the state average of 13.8%. Graduation rates have climbed from 66.1% in 2020–2021 to 82.5% in 2024–2025. With a free/reduced lunch rate of 32.4%, the school serves a moderate share of economically disadvantaged students—lower than Clearwater Valley's 58.6% but higher than Prairie's 21.6%—yet it continues to produce strong academic outcomes. The absence of math test data for Grangeville remains a notable gap for parents to keep in mind when comparing school options.