For the 2026 school year, there are 6 public schools serving 1,077 students in Grant County, SD (there are 1 private school, serving 138 private students). 89% of all K-12 students in Grant County, SD are educated in public schools (compared to the SD state average of 91%). Grant County has one of the highest concentrations of top-ranked public schools in South Dakota.
The top-ranked public schools in Grant County, SD are Big Stone City Elementary - 01, Big Stone City Middle School - 03 and Milbank Elementary - 03. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.
Grant County, SD public schools have an average math proficiency score of 51% (versus the South Dakota public school average of 43%), and reading proficiency score of 65% (versus the 51% statewide average). Schools in Grant County have an average ranking of 10/10, which is in the top 10% of South Dakota public schools.
Minority enrollment is 19% of the student body (majority Hispanic), which is less than the South Dakota public school average of 33% (majority American Indian).
Best Public Schools in Grant County (2026)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Big Stone City Elementary - 01
(Math: ≥80% | Reading: 60-79%)
Rank:
Rank:
10/
Top 5%10
655 Walnut St
Big Stone City, SD 57216
(605) 862-8108
Big Stone City, SD 57216
(605) 862-8108
Gr: PK-5 | 57 students Student-teacher ratio: 8:1 Minority enrollment: 16%
Rank: #22.
Big Stone City Middle School - 03
(Math: 60-79% | Reading: 60-79%)
Rank:
Rank:
10/
Top 5%10
655 Walnut St
Big Stone City, SD 57216
(605) 862-8108
Big Stone City, SD 57216
(605) 862-8108
Gr: 6-8 | 16 students Student-teacher ratio: 4:1
Rank: #33.
Milbank Elementary - 03
(Math: 56% | Reading: 70-74%)
Rank:
Rank:
10/
Top 10%10
507 S 9th St
Milbank, SD 57252
(605) 432-6615
Milbank, SD 57252
(605) 432-6615
Gr: PK-5 | 429 students Student-teacher ratio: 12:1 Minority enrollment: 21%
Rank: #44.
Milbank High School - 01
(Math: 50-54% | Reading: 70-74%)
Rank:
Rank:
9/
Top 20%10
1001 E Park Ave
Milbank, SD 57252
(605) 432-5546
Milbank, SD 57252
(605) 432-5546
Gr: 9-12 | 362 students Student-teacher ratio: 13:1 Minority enrollment: 18%
Rank: #55.
Milbank Middle School - 02
(Math: 41% | Reading: 56%)
Rank:
Rank:
5/
Bottom 50%10
1001 E Park Ave
Milbank, SD 57252
(605) 432-5519
Milbank, SD 57252
(605) 432-5519
Gr: 6-8 | 213 students Student-teacher ratio: 13:1 Minority enrollment: 18%
Grant County Public Schools (Closed)
School
Location
Quick Facts
15765 484th Ave
Revillo, SD 57259
(605) 432-6615
Revillo, SD 57259
(605) 432-6615
Gr: K-8 | 10 students Student-teacher ratio: 10:1
16370 482nd Ave
Revillo, SD 57259
(605) 623-4241
Revillo, SD 57259
(605) 623-4241
Gr: K-5 | 27 students Student-teacher ratio: 5:1
16370 482nd Ave
Revillo, SD 57259
(605) 623-4241
Revillo, SD 57259
(605) 623-4241
Gr: 9-12 | 17 students Student-teacher ratio: 4:1
16370 482nd Ave
Revillo, SD 57259
(605) 623-4241
Revillo, SD 57259
(605) 623-4241
Gr: 6-8 | 16 students Student-teacher ratio: 8:1
16370 482nd Ave
Revillo, SD 57259
(605) 623-4241
Revillo, SD 57259
(605) 623-4241
Gr: PK | 2 students
Frequently Asked Questions
What are the top-ranked public schools in Grant County, SD?
The top-ranked public schools in Grant County, SD include Big Stone City Elementary - 01, Big Stone City Middle School - 03 and Milbank Elementary - 03. Grant County has one of the highest concentrations of top-ranked public schools in South Dakota.
How many public schools are located in Grant County?
6 public schools are located in Grant County.
What percentage of students in Grant County go to public school?
89% of all K-12 students in Grant County are educated in public schools (compared to the SD state average of 91%).
What is the racial composition of students in Grant County?
Grant County public schools minority enrollment is 19% of the student body (majority Hispanic), which is less than the South Dakota public schools average of 33% (majority American Indian).
Recent Articles
Year-Round Schooling in 2026: Updated Parent Guide
Explore the latest 2026 data, trends, costs, and parent planning tips in the ongoing debate over year-round schooling vs the traditional calendar.
No Child Left Behind: Past, Present, and Future of U.S. School Policy
Explore how No Child Left Behind evolved into ESSA, what it means for 2025‑26 schooling, and what parents need to know about testing, admissions planning, and funding.
Understanding Public School Fees & Optional Costs Guide
Discover what public school fees are required versus optional, with 2026 updates for parents, students, and educators on budgeting and planning.
