For the 2026 school year, there are 4 public schools serving 345 students in Castlewood, SD.
The top-ranked public schools in Castlewood, SD are Castlewood Elementary - 02, Claremont Colony Elementary - 04 and Castlewood High School - 01. Overall testing rank is based on a school's combined math and reading proficiency test score ranking.
Castlewood, SD public schools have an average math proficiency score of 52% (versus the South Dakota public school average of 43%), and reading proficiency score of 52% (versus the 51% statewide average). Schools in Castlewood have an average ranking of 7/10, which is in the top 50% of South Dakota public schools.
Minority enrollment is 8% 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 Castlewood, SD (2026)
School
(Math and Reading Proficiency)
(Math and Reading Proficiency)
Location
Quick Facts
Rank: #11.
Castlewood Elementary - 02
(Math: 60-64% | Reading: 50-54%)
Rank:
Rank:
8/
Top 30%10
310 E Harry St
Castlewood, SD 57223
(605) 793-2497
Castlewood, SD 57223
(605) 793-2497
Gr: PK-5 | 140 students Student-teacher ratio: 13:1 Minority enrollment: 6%
Rank: #22.
Claremont Colony Elementary - 04
(Math: <50% | Reading: <50%)
Rank:
Rank:
6/
Top 50%10
46271 184th St
Castlewood, SD 57223
(605) 793-2497
Castlewood, SD 57223
(605) 793-2497
Gr: K-8 | 17 students Student-teacher ratio: 17:1
Rank: #33.
Castlewood High School - 01
(Math: 40-59% | Reading: ≥50%)
Rank:
Rank:
5/
Bottom 50%10
310 E Harry St
Castlewood, SD 57223
(605) 793-2497
Castlewood, SD 57223
(605) 793-2497
Gr: 9-12 | 112 students Student-teacher ratio: 16:1 Minority enrollment: 9%
Rank: #44.
Castlewood Middle School - 03
(Math: 40-44% | Reading: 50-54%)
Rank:
Rank:
5/
Bottom 50%10
310 E Harry St
Castlewood, SD 57223
(605) 793-2497
Castlewood, SD 57223
(605) 793-2497
Gr: 6-8 | 76 students Student-teacher ratio: 19:1 Minority enrollment: 9%
Frequently Asked Questions
What are the top-ranked public schools in Castlewood, SD?
The top-ranked public schools in Castlewood, SD include Castlewood Elementary - 02, Claremont Colony Elementary - 04 and Castlewood High School - 01.
How many public schools are located in Castlewood?
4 public schools are located in Castlewood.
What is the racial composition of students in Castlewood?
Castlewood public schools minority enrollment is 8% of the student body (majority Hispanic), which is less than the South Dakota public schools average of 34% (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.