For the 2026 school year, there are 3 public middle schools serving 274 students in Custer County, ID.
The top-ranked public middle schools in Custer County, ID are Stanley Elem/jr High School, Mackay Jr/sr High School and Challis Jr/sr High School. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.
Custer County, ID public middle schools have an average math proficiency score of 29% (versus the Idaho public middle school average of 38%), and reading proficiency score of 44% (versus the 55% statewide average). Middle schools in Custer County have an average ranking of 2/10, which is in the bottom 50% of Idaho public middle schools.
Minority enrollment is 12% of the student body (majority Hispanic), which is less than the Idaho public middle school average of 26% (majority Hispanic).
Best Public Middle Schools in Custer County (2026)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Stanley Elem/jr High School
(Math: <50% | Reading: ≥50%)
Rank:
Rank:
6/
Top 50%10
Airport Road
Stanley, ID 83278
(208) 774-3503
Stanley, ID 83278
(208) 774-3503
Gr: K-8 | 23 students Student-teacher ratio: 8:1 Minority enrollment: 4%
Rank: #22.
Mackay Jr/sr High School
(Math: 20-29% | Reading: 50-59%)
Rank:
Rank:
4/
Bottom 50%10
390 East Spruce Street
Mackay, ID 83251
(208) 588-2262
Mackay, ID 83251
(208) 588-2262
Gr: 7-12 | 104 students Student-teacher ratio: 13:1 Minority enrollment: 10%
Rank: #33.
Challis Jr/sr High School
(Math: 25-29% | Reading: 35-39%)
Rank:
Rank:
2/
Bottom 50%10
1110 Bluff Avenue
Challis, ID 83226
(208) 879-2255
Challis, ID 83226
(208) 879-2255
Gr: 7-12 | 136 students Student-teacher ratio: 9:1 Minority enrollment: 10%
Frequently Asked Questions
What are the top-ranked public middle schools in Custer County, ID?
The top-ranked public middle schools in Custer County, ID include Stanley Elem/jr High School, Mackay Jr/sr High School and Challis Jr/sr High School.
How many public middle schools are located in Custer County?
3 public middle schools are located in Custer County.
What is the racial composition of students in Custer County?
Custer County public middle schools minority enrollment is 12% of the student body (majority Hispanic), which is less than the Idaho public middle 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.