For the 2026 school year, there are 7 public schools serving 1,077 students in Grant County, SD (there are 1 private school, serving 122 private students). 90% 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 34% (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 | 60 students Student-teacher ratio: 10:1 Minority enrollment: 20%
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 | 19 students Student-teacher ratio: 5:1 Minority enrollment: 5%
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 | 408 students Student-teacher ratio: 12:1 Minority enrollment: 24%
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 | 333 students Student-teacher ratio: 12:1 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 | 222 students Student-teacher ratio: 13:1 Minority enrollment: 19%
Rank: n/an/a
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
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?
90% 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 34% (majority American Indian).
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