| ZIP Codes: | 3 ZIP Codes (3 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Code: | 605 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:13:41 PM |
| Population: | 2,540 [See All] |
| FIPS: | 46003 |
| Land Area: | 637 sq mi |
| Water Area: | 4 sq mi |
| Coordinates: | 43.6808, -98.5533 |
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2,540 residents live across 3 ZIPs covering 637 sq mi, served by 3 distinct USPS-recognized cities.
Population moved from 2,665 to 2,540 from 2014 to 2024 — a -4.7% change. 1 ZIPs gained residents, 2 lost.
The county's wealthiest ZIP 57368 (Plankinton, $74,688 median) and poorest ZIP 57383 (White Lake, $62,917) are 11.7 miles apart — a 1.2× income gap across local geography.
Median home values vary 1.9× across this county — from $108,900 in 57383 (White Lake) to $202,700 in 57368 (Plankinton).
Density varies 1× across the county — from 3 people/sq mi in 57383 (White Lake) to 4 in 57368 (Plankinton).
Educational attainment ranges from 15.1% bachelor's+ in 57383 (White Lake) to 27.7% in 57368 (Plankinton) — the breadth of educational profiles across the area.
Within South Dakota, this is the #51 most populous of 82 counties and ranks #56 for median household income .
Weighted by population, the typical household earns about $69,521 across the county — reflecting what a typical resident sees, not a simple ZIP average.
21.7% of adults age 25+ hold a bachelor's degree or higher (366 of 1,689 reporting).
3 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.
A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.