| ZIP Codes: | 7 ZIP Codes (7 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Code: | 605 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 11:55:01 PM |
| Population: | 5,426 [See All] |
| FIPS: | 46037 |
| Land Area: | 1,076 sq mi |
| Water Area: | 64 sq mi |
| Coordinates: | 45.4129, -97.5860 |
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5,426 residents live across 7 ZIPs covering 1,076 sq mi, served by 7 distinct USPS-recognized cities.
Population moved from 5,639 to 5,426 from 2014 to 2024 — a -3.8% change. 4 ZIPs gained residents, 3 lost.
The county's wealthiest ZIP 57239 (Grenville, $106,389 median) and poorest ZIP 57273 (Waubay, $48,167) are 13.7 miles apart — a 2.2× income gap across local geography.
Median home values vary 3.9× across this county — from $95,700 in 57219 (Bristol) to $377,300 in 57239 (Grenville).
Density varies 6× across the county — from 1 people/sq mi in 57422 (Andover) to 8 in 57239 (Grenville).
Educational attainment ranges from 10.5% bachelor's+ in 57219 (Bristol) to 34.9% in 57239 (Grenville) — the breadth of educational profiles across the area.
Within South Dakota, this is the #35 most populous of 82 counties and ranks #44 for median household income .
Weighted by population, the typical household earns about $66,247 across the county — reflecting what a typical resident sees, not a simple ZIP average.
22.1% of adults age 25+ hold a bachelor's degree or higher (853 of 3,856 reporting).
7 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.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 57274 | Webster | Standard | 2,621 | $68,083 | 413.0 | -4.2% |
| 57273 | Waubay | Standard | 1,165 | $48,167 | 181.7 | -11.7% |
| 57219 | Bristol | Standard | 552 | $51,900 | 145.7 | 2.8% |
| 57239 | Grenville | Standard | 358 | $106,389 | 45.2 | 23.0% |
| 57468 | Pierpont | Standard | 279 | $76,250 | 88.5 | 18.2% |
| 57261 | Roslyn | Standard | 277 | $77,813 | 73.1 | 9.5% |
| 57422 | Andover | Standard | 174 | $88,125 | 129.0 | -34.8% |