| District | City | Rating | Students | Schools | Grades | Zip Codes |
|---|---|---|---|---|---|---|
| Timber Lake School District 20-3 | Glencross | 10/10 Excellent · 91st pct | 362 | 3 | PK–12 | 4 |
| Eagle Butte School District 20-1 | Eagle Butte | 1/10 Poor · 2nd pct | 362 | 6 | K–12 | 3 |
How Dewey County compares
Together they enroll 724 students across 9 schools. The largest is Timber Lake School District 20-3 with 362 students. Districts here average 5.5/10, below the South Dakota average of 5.6/10. Ratings range from 1/10 to 10/10.
School Districts in Dewey County, South Dakota
Dewey County has 2 public school districts covering 7 zip codes. The top-rated district in Dewey County is Timber Lake School District 20-3 (10/10). Ratings are based on the share of students proficient in reading and math on state assessments (NCES EDFacts, 2021–22 for most districts), ranked against all districts in South Dakota. Directory details come from NCES CCD 2024–25.
Enter your zip code on any page to confirm your exact district assignment — district boundaries are address-specific and may not follow county or city lines.
Frequently Asked Questions
How many school districts are in Dewey County, SD?
2 school districts serve zip codes in Dewey County, SD. This page lists each one with its rating, enrollment, grade span and the zip codes it covers.
What is the best-rated school district in Dewey County, SD?
Of the districts serving Dewey County, Timber Lake School District 20-3 has the highest rating on this site at 10/10. That places it in the 91st percentile among South Dakota school districts.
How are these school district ratings calculated?
Each rating is the share of students scoring proficient or above on South Dakota reading and math assessments, ranked against other districts in South Dakota and converted to a 1–10 scale. Percentiles compare districts within South Dakota only, never across state lines.