For the 2025-26 school year, there are 3 public schools serving 215 students in Sully County, SD.
The top ranked public schools in Sully County, SD are Onida Elementary - 04, Sully Buttes Middle School - 06 and Sully Buttes High School - 07. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.
Sully County, SD public schools have an average math proficiency score of 54% (versus the South Dakota public school average of 43%), and reading proficiency score of 63% (versus the 51% statewide average). Schools in Sully County have an average ranking of 10/10, which is in the top 10% of South Dakota public schools.
Minority enrollment is 16% of the student body (majority American Indian and Hispanic), which is less than the South Dakota public school average of 33% (majority American Indian).
Best Public Schools in Sully County (2025-26)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Onida Elementary - 04
(Math: 50-59% | Reading: 70-79%)
Rank:
Rank:
10/
Top 10%10
500 8th St
Onida, SD 57564
(605) 258-2617
Onida, SD 57564
(605) 258-2617
Gr: K-5 | 85 students Student-teacher ratio: 9:1 Minority enrollment: 15%
Rank: #22.
Sully Buttes Middle School - 06
(Math: 50-59% | Reading: 50-59%)
Rank:
Rank:
8/
Top 30%10
500 8th St
Onida, SD 57564
(605) 258-2618
Onida, SD 57564
(605) 258-2618
Gr: 6-8 | 58 students Student-teacher ratio: 10:1 Minority enrollment: 15%
Rank: #33.
Sully Buttes High School - 07
(Math: <50% | Reading: 40-59%)
Rank:
Rank:
5/
Bottom 50%10
500 8th St
Onida, SD 57564
(605) 258-2617
Onida, SD 57564
(605) 258-2617
Gr: 9-12 | 72 students Student-teacher ratio: 10:1 Minority enrollment: 17%
Sully County Public Schools (Closed)
School
Location
Quick Facts
Frequently Asked Questions
What are the top ranked public schools in Sully County, SD?
The top ranked public schools in Sully County, SD include Onida Elementary - 04, Sully Buttes Middle School - 06 and Sully Buttes High School - 07.
How many public schools are located in Sully County?
3 public schools are located in Sully County.
What is the racial composition of students in Sully County?
Sully County public schools minority enrollment is 16% of the student body (majority American Indian and Hispanic), which is less than the South Dakota public schools average of 33% (majority American Indian).
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