| ZIP Codes: | 3 ZIP Codes (3 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Code: | 605 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:13:42 PM |
| Population: | 21,051 [See All] |
| FIPS: | 46035 |
| CBSA: | Mitchell, SD |
| Land Area: | 530 sq mi |
| Water Area: | 1 sq mi |
| Coordinates: | 43.6478, -98.1092 |
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21,051 residents live across 3 ZIPs covering 530 sq mi, served by 3 distinct USPS-recognized cities.
Population moved from 20,424 to 21,051 from 2014 to 2024 — a +3.1% change. 2 ZIPs gained residents, 1 lost.
The county's wealthiest ZIP 57363 (Mount Vernon, $77,841 median) and poorest ZIP 57334 (Ethan, $62,167) are 15.5 miles apart — a 1.3× income gap across local geography.
Median home values vary 1.0× across this county — from $203,300 in 57363 (Mount Vernon) to $208,200 in 57301 (Mitchell).
Density varies 17× across the county — from 5 people/sq mi in 57363 (Mount Vernon) to 81 in 57301 (Mitchell).
Educational attainment ranges from 17.9% bachelor's+ in 57363 (Mount Vernon) to 25.9% in 57334 (Ethan) — the breadth of educational profiles across the area.
Within South Dakota, this is the #10 most populous of 82 counties and ranks #60 for median household income .
Weighted by population, the typical household earns about $65,945 across the county — reflecting what a typical resident sees, not a simple ZIP average.
22.8% of adults age 25+ hold a bachelor's degree or higher (3,242 of 14,205 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.
One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.