For the 2026 school year, there are 4 public high schools serving 691 students in Idaho County, ID.
The top-ranked public high schools in Idaho County, ID are Grangeville High School, Prairie Jr/sr High School and Salmon River Jr/sr High School. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.
Idaho County, ID public high schools have an average math proficiency score of 48% (versus the Idaho public high school average of 37%), and reading proficiency score of 57% (versus the 58% statewide average). High schools in Idaho County have an average ranking of 8/10, which is in the top 30% of Idaho public high schools.
Idaho County, ID public high school have a Graduation Rate of 68%, which is less than the Idaho average of 80%.
The school with highest graduation rate is Prairie Jr/sr High School, with ≥80% graduation rate. Read more about public school graduation rate statistics in Idaho or national school graduation rate statistics.
Minority enrollment is 13% of the student body (majority Hispanic), which is less than the Idaho public high school average of 26% (majority Hispanic).
Best Public High Schools in Idaho County (2026)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Grangeville High School
(Math: 55-59% | Reading: 70-74%)
Rank:
Rank:
9/
Top 20%10
910 South D Street
Grangeville, ID 83530
(208) 983-0580
Grangeville, ID 83530
(208) 983-0580
Gr: 9-12 | 244 students Student-teacher ratio: 15:1 Minority enrollment: 13%
Rank: #22.
Prairie Jr/sr High School
(Math: 65-69% | Reading: 55-59%)
Rank:
Rank:
9/
Top 20%10
453 Keuterville Road
Cottonwood, ID 83522
(208) 962-3901
Cottonwood, ID 83522
(208) 962-3901
Gr: 7-12 | 204 students Student-teacher ratio: 15:1 Minority enrollment: 5%
Rank: #33.
Salmon River Jr/sr High School
(Math: 30-39% | Reading: 60-69%)
Rank:
Rank:
7/
Top 50%10
711 Ace's Place
Riggins, ID 83549
(208) 628-3431
Riggins, ID 83549
(208) 628-3431
Gr: 6-12 | 81 students Student-teacher ratio: 9:1 Minority enrollment: 18%
Rank: #44.
Clearwater Valley Jr/sr
(Math: 30-34% | Reading: 45-49%)
Rank:
Rank:
4/
Bottom 50%10
4643 Highway 13
Kooskia, ID 83539
(208) 926-4511
Kooskia, ID 83539
(208) 926-4511
Gr: 7-12 | 169 students Student-teacher ratio: 12:1 Minority enrollment: 18%
Frequently Asked Questions
What are the top-ranked public high schools in Idaho County, ID?
The top-ranked public high schools in Idaho County, ID include Grangeville High School, Prairie Jr/sr High School and Salmon River Jr/sr High School.
How many public high schools are located in Idaho County?
4 public high schools are located in Idaho County.
What is the racial composition of students in Idaho County?
Idaho County public high schools minority enrollment is 13% of the student body (majority Hispanic), which is less than the Idaho public high schools average of 26% (majority Hispanic).
Recent Articles
When “Free Public School” Still Isn’t Free
Discover the hidden costs of public school in 2026, from supplies and fees to transportation, technology, and extracurricular expenses.
What a District Budget Cut Means for Your Child's School Experience
Learn how district budget cuts can affect class sizes, programs, staffing, transportation, and your child's daily school experience in 2026.
School Closure Risk: What Parents Should Check Before Moving
Learn how parents can assess school closure risk before buying or renting in a district, using enrollment, funding, and boundary data.