Castlewood High School at a glance
- National rank: #6,962 (2026-27 edition)
- South Dakota rank: #30
- Previous edition: Up from #9,964 in 2022-23
- Graduation rate: 100%
- Students: 112
Ranks are from the 2026-27 U.S. News & World Report Best High Schools edition. How HighSchoolTrends uses this data.