For the 2026 school year, there are 3 public elementary schools serving 300 students in Custer County, ID.
The top-ranked public elementary schools in Custer County, ID are Stanley Elem/jr High School, Challis Elementary School and Mackay Elementary School. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.
Custer County, ID public elementary schools have an average math proficiency score of 32% (versus the Idaho public elementary school average of 42%), and reading proficiency score of 48% (versus the 54% statewide average). Elementary schools in Custer County have an average ranking of 4/10, which is in the bottom 50% of Idaho public elementary schools.
Minority enrollment is 11% of the student body (majority Hispanic), which is less than the Idaho public elementary school average of 27% (majority Hispanic).
Best Public Elementary 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
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 | 166 students Student-teacher ratio: 14:1 Minority enrollment: 11%
Rank: #33.
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 | 111 students Student-teacher ratio: 14:1 Minority enrollment: 14%
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 elementary schools in Custer County, ID?
The top-ranked public elementary schools in Custer County, ID include Stanley Elem/jr High School, Challis Elementary School and Mackay Elementary School.
How many public elementary schools are located in Custer County?
3 public elementary schools are located in Custer County.
What is the racial composition of students in Custer County?
Custer County public elementary schools minority enrollment is 11% of the student body (majority Hispanic), which is less than the Idaho public elementary schools average of 27% (majority Hispanic).