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Timber Lake School District 20-3, South Dakota

Timber Lake School District 20-3 is a unified school district in Dewey County, Corson County, and Ziebach County, South Dakota, for grades Pre-K to 12. About 1,694 people live in it (2020–2024 estimate). It covers 1,208 sq mi (3,129 km²) of land.

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Timber Lake School District 20-3 in South Dakota
Smee School District 15-3
Timber Lake School District 20-3 and its neighbors (simplified outlines). Open in OpenStreetMap ↗
Population, 2020–2024 estimate
1,694 ± 220
Grades
Pre-K to 12
Type
Unified school district
Counties
Dewey County80% of the district’s landCorson County15% of the district’s landZiebach County5% of the district’s land
Land area
1,208 sq mi (3,129 km²)
Median household income
$63,839 ± $5,214
Median home value
$73,500 ± $16,443
Water area
48.2 sq mi (125 km²)
State
South Dakota
Census code (GEOID)
4671880
Coordinates (central point)
45.385476, -100.938000
Check a point in the school district finder

These coordinates mark a central point for the district, not a school or an address. Population, income and home value: U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, ± margin at 90% confidence; checked on October 20, 2026.

Towns, townships and communities in Timber Lake School District 20-3, largest first

  1. Timber Lake (city)779 people
  2. Isabel (town)214 people
  3. Whitehorse (CDP)162 people
  4. Ridgeland Township57 people
  5. Pleasant Ridge Township3 people

A town, township, city or borough is listed when at least half its land is in the district; a community, when its central point is. Near a district line, an address can belong to the district next door.

Bordering unified school districts, nearest first

  1. Smee School District 15-326 mi northeast
  2. McLaughlin School District 15-227 mi north
  3. Eagle Butte School District 20-127 mi south
  4. McIntosh School District 15-136 mi northwest
  5. Mobridge-Pollock School District 62-640 mi northeast
  6. Selby School District 62-542 mi east
  7. Hoven School District 53-250 mi east
  8. Dupree School District 64-250 mi southwest
  9. Lemmon School District 52-458 mi northwest

These share a boundary with Timber Lake School District 20-3. Distances are straight lines between central points.

Before using this answer for enrollment

A district boundary doesn’t decide which school a student attends; the district’s attendance zones and rules do. Confirm the full address and grade with Timber Lake School District 20-3 before you rely on it.

See its schools and enrollment on NCES ↗

Find the school district where you are now or find your town or township.