| ZIP Codes: | 3 ZIP Codes (3 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Code: | 605 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:13:44 PM |
| Population: | 2,632 [See All] |
| FIPS: | 46111 |
| CBSA: | Mitchell, SD |
| Land Area: | 653 sq mi |
| Water Area: | 2 sq mi |
| Coordinates: | 43.9947, -98.1746 |
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2,632 residents live across 3 ZIPs covering 653 sq mi, served by 3 distinct USPS-recognized cities.
Population moved from 2,563 to 2,632 from 2014 to 2024 — a +2.7% change. 2 ZIPs gained residents, 1 lost.
The county's wealthiest ZIP 57359 (Letcher, $106,818 median) and poorest ZIP 57385 (Woonsocket, $70,404) are 10.9 miles apart — a 1.5× income gap across local geography.
Median home values vary 1.3× across this county — from $126,900 in 57385 (Woonsocket) to $166,800 in 57359 (Letcher).
Density varies 3× across the county — from 2 people/sq mi in 57314 (Artesian) to 6 in 57385 (Woonsocket).
Educational attainment ranges from 17.4% bachelor's+ in 57385 (Woonsocket) to 29.8% in 57359 (Letcher) — the breadth of educational profiles across the area.
Within South Dakota, this is the #48 most populous of 82 counties and ranks #15 for median household income .
Weighted by population, the typical household earns about $82,708 across the county — reflecting what a typical resident sees, not a simple ZIP average.
22.0% of adults age 25+ hold a bachelor's degree or higher (392 of 1,779 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.