For the 2026 school year, there are 8 public middle schools serving 786 students in Charles Mix County, SD.
The top-ranked public middle schools in Charles Mix County, SD are Cedar Grove Colony Elementary - 14, Platte - Geddes Jr. High - 03 and Lakeview Colony Elementary - 05. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.
Charles Mix County, SD public middle schools have an average math proficiency score of 35% (versus the South Dakota public middle school average of 39%), and reading proficiency score of 48% (versus the 49% statewide average). Middle schools in Charles Mix County have an average ranking of 3/10, which is in the bottom 50% of South Dakota public middle schools.
Minority enrollment is 62% of the student body (majority American Indian), which is more than the South Dakota public middle school average of 42% (majority American Indian).
Best Public Middle Schools in Charles Mix County (2026)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Cedar Grove Colony Elementary - 14
(Math: ≥80% | Reading: 60-79%)
Rank:
Rank:
10/
Top 5%10
36926 266th St
Platte, SD 57369
(605) 337-2468
Platte, SD 57369
(605) 337-2468
Gr: K-8 | 44 students Student-teacher ratio: 15:1
Rank: #22.
Platte - Geddes Jr. High - 03
(Math: 55-59% | Reading: 60-64%)
Rank:
Rank:
9/
Top 20%10
400 Illinois Ave
Platte, SD 57369
(605) 337-3391
Platte, SD 57369
(605) 337-3391
Gr: 6-8 | 94 students Student-teacher ratio: 13:1 Minority enrollment: 13%
Rank: #33.
Lakeview Colony Elementary - 05
(Math: 40-59% | Reading: 60-79%)
Rank:
Rank:
8/
Top 30%10
28748 386th Ave
Lake Andes, SD 57356
(605) 487-7655
Lake Andes, SD 57356
(605) 487-7655
Gr: K-8 | 23 students Student-teacher ratio: 12:1
Rank: #44.
Platte Colony Elementary - 10
(Math: ≥50% | Reading: ≥50%)
Rank:
Rank:
8/
Top 30%10
35271 270 St
Platte, SD 57369
(605) 337-3391
Platte, SD 57369
(605) 337-3391
Gr: K-8 | 22 students Student-teacher ratio: 7:1
Rank: #55.
Tripp-delmont Jr. High - 02
(Math: <50% | Reading: <50%)
Rank:
Rank:
6/
Top 50%10
105 S Sloan
Pickstown, SD 57367
(605) 935-6766
Pickstown, SD 57367
(605) 935-6766
Gr: 7-8 | 18 students Student-teacher ratio: 9:1
Rank: #66.
Wagner Middle School - 03
(Math: 21% | Reading: 44%)
Rank:
Rank:
2/
Bottom 50%10
101 Walnut Ave Sw
Wagner, SD 57380
(605) 384-3913
Wagner, SD 57380
(605) 384-3913
Gr: 5-8 | 283 students Student-teacher ratio: 13:1 Minority enrollment: 73%
Rank: #77.
Andes Central Middle School - 04
(Math: 20-29% | Reading: 20-29%)
Rank:
Rank:
1/
Bottom 50%10
1001 High St
Lake Andes, SD 57356
(605) 487-5207
Lake Andes, SD 57356
(605) 487-5207
Gr: 6-8 | 51 students Student-teacher ratio: 7:1 Minority enrollment: 82%
Rank: n/an/a
100 South Main
Marty, SD 57361
(605) 384-2212
Marty, SD 57361
(605) 384-2212
Gr: K-12 | 220 students Student-teacher ratio: 7:1
Frequently Asked Questions
What are the top-ranked public middle schools in Charles Mix County, SD?
The top-ranked public middle schools in Charles Mix County, SD include Cedar Grove Colony Elementary - 14, Platte - Geddes Jr. High - 03 and Lakeview Colony Elementary - 05.
How many public middle schools are located in Charles Mix County?
9 public middle schools are located in Charles Mix County.
What is the racial composition of students in Charles Mix County?
Charles Mix County public middle schools minority enrollment is 62% of the student body (majority American Indian), which is more than the South Dakota public middle schools average of 42% (majority American Indian).
Recent Articles
When “Free Public School” Still Isn’t Free
Discover the hidden costs of public school in 2026, from supplies and fees to transportation, technology, and extracurricular expenses.
What a District Budget Cut Means for Your Child's School Experience
Learn how district budget cuts can affect class sizes, programs, staffing, transportation, and your child's daily school experience in 2026.
School Closure Risk: What Parents Should Check Before Moving
Learn how parents can assess school closure risk before buying or renting in a district, using enrollment, funding, and boundary data.