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).
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