For the 2026-27 school year, there are 5 public schools serving 551 students in Custer County, ID.
The top-ranked public schools in Custer County, ID are Stanley Elem/jr High School, Challis Elementary School and Mackay 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 schools have an average math proficiency score of 30% (versus the Idaho public school average of 41%), and reading proficiency score of 46% (versus the 55% statewide average). Schools in Custer County have an average ranking of 2/10, which is in the bottom 50% of Idaho public schools.
Minority enrollment is 12% of the student body (majority Hispanic), which is less than the Idaho public school average of 28% (majority Hispanic).
Best Public Schools in Custer County (2026-27)
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.
Challis Elementary School
(Math: 35-39% | Reading: 50-54%)
Rank:
Rank:
5/
Bottom 50%10
950 Bluff Avenue
Challis, ID 83226
(208) 879-2439
Challis, ID 83226
(208) 879-2439
Gr: PK-6 | 173 students Student-teacher ratio: 12:1 Minority enrollment: 11%
Rank: #33.
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: #44.
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%
Rank: #55.
Mackay Elementary School
(Math: 20-24% | Reading: 40-44%)
Rank:
Rank:
2/
Bottom 50%10
400 East Spruce Street
Mackay, ID 83251
(208) 588-2834
Mackay, ID 83251
(208) 588-2834
Gr: PK-6 | 114 students Student-teacher ratio: 14:1 Minority enrollment: 13%
Custer County Public Schools (Closed)
School
Location
Quick Facts
Po Box 304
Challis, ID 83226
(208) 879-5063
Challis, ID 83226
(208) 879-5063
Gr: 6-8 | 129 students Student-teacher ratio: 16:1 Minority enrollment: 9%
Hc 67 - Box 586
Clayton, ID 83227
(208) 838-2244
Clayton, ID 83227
(208) 838-2244
Gr: K-5 | 7 students Student-teacher ratio: 7:1
Frequently Asked Questions
What are the top-ranked public schools in Custer County, ID?
The top-ranked public schools in Custer County, ID include Stanley Elem/jr High School, Challis Elementary School and Mackay Jr/sr High School.
How many public schools are located in Custer County?
5 public schools are located in Custer County.
What is the racial composition of students in Custer County?
Custer County public schools minority enrollment is 12% of the student body (majority Hispanic), which is less than the Idaho public schools average of 28% (majority Hispanic).
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