For the 2026 school year, there are 4 public high schools serving 554 students in Charles Mix County, SD.
The top-ranked public high schools in Charles Mix County, SD are Wagner High School - 01, Andes Central High School - 01 and Platte - Geddes High School - 01. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.
Charles Mix County, SD public high schools have an average math proficiency score of 39% (versus the South Dakota public high school average of 40%), and reading proficiency score of 76% (versus the 63% statewide average). High schools in Charles Mix County have an average ranking of 9/10, which is in the top 20% of South Dakota public high schools.
Charles Mix County, SD public high school have a Graduation Rate of 87%, which is more than the South Dakota average of 82%.
The school with highest graduation rate is Platte - Geddes High School - 01, with ≥90% graduation rate. Read more about public school graduation rate statistics in South Dakota or national school graduation rate statistics.
Minority enrollment is 69% of the student body (majority American Indian), which is more than the South Dakota public high school average of 36% (majority American Indian).
Best Public High Schools in Charles Mix County (2026)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Wagner High School - 01
(Math: 40-49% | Reading: 80-89%)
Rank:
Rank:
8/
Top 30%10
101 Walnut Ave Sw
Wagner, SD 57380
(605) 384-5426
Wagner, SD 57380
(605) 384-5426
Gr: 9-12 | 201 students Student-teacher ratio: 12:1 Minority enrollment: 69%
Rank: #22.
Andes Central High School - 01
(Math: <50% | Reading: <50%)
Rank:
Rank:
6/
Top 50%10
1001 High St
Lake Andes, SD 57356
(605) 487-7671
Lake Andes, SD 57356
(605) 487-7671
Gr: 9-12 | 65 students Student-teacher ratio: 8:1 Minority enrollment: 80%
Rank: #33.
Platte - Geddes High School - 01
(Math: 21-39% | Reading: 60-69%)
Rank:
Rank:
5/
Bottom 50%10
400 Illinois Ave
Platte, SD 57369
(605) 337-3391
Platte, SD 57369
(605) 337-3391
Gr: 9-12 | 132 students Student-teacher ratio: 11:1 Minority enrollment: 13%
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
Charles Mix County Public Schools (Closed)
School
Location
Quick Facts
Po Box 197
Geddes, SD 57342
(605) 337-3382
Geddes, SD 57342
(605) 337-3382
Gr: PK-6 | 47 students Student-teacher ratio: 9:1 Minority enrollment: 13%
Po Box 197
Geddes, SD 57342
(605) 337-3382
Geddes, SD 57342
(605) 337-3382
Gr: 9-12 | 34 students Student-teacher ratio: 9:1
Po Box 197
Geddes, SD 57342
(605) 337-3382
Geddes, SD 57342
(605) 337-3382
Gr: 7-8 | 12 students Student-teacher ratio: 12:1 Minority enrollment: 8%
Po Box 140
Platte, SD 57369
(605) 337-2468
Platte, SD 57369
(605) 337-2468
Gr: K-8 | 6 students
28949 377th Ave
Lake Andes, SD 57356
(605) 487-7655
Lake Andes, SD 57356
(605) 487-7655
Gr: K-8 | 22 students Student-teacher ratio: 11:1
Po Box 140
Platte, SD 57369
(605) 337-2468
Platte, SD 57369
(605) 337-2468
Gr: K-8 | 24 students Student-teacher ratio: 12:1
Po Box 140
Platte, SD 57369
(605) 337-2468
Platte, SD 57369
(605) 337-2468
Gr: PK-6 | 177 students Student-teacher ratio: 13:1 Minority enrollment: 1%
Po Box 140
Platte, SD 57369
(605) 337-3391
Platte, SD 57369
(605) 337-3391
Gr: 9-12 | 136 students Student-teacher ratio: 12:1
Po Box 140
Platte, SD 57369
(605) 337-3391
Platte, SD 57369
(605) 337-3391
Gr: 7-8 | 55 students Student-teacher ratio: 14:1
Frequently Asked Questions
What are the top-ranked public high schools in Charles Mix County, SD?
The top-ranked public high schools in Charles Mix County, SD include Wagner High School - 01, Andes Central High School - 01 and Platte - Geddes High School - 01.
How many public high schools are located in Charles Mix County?
4 public high schools are located in Charles Mix County.
What is the racial composition of students in Charles Mix County?
Charles Mix County public high schools minority enrollment is 69% of the student body (majority American Indian), which is more than the South Dakota public high schools average of 36% (majority American Indian).
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