| ZIP Codes: | 5 ZIP Codes (3 Standard, 2 PO Box, 0 Unique) [See All] |
| Area Codes: | 308 / 402 / 531 / 605 |
| Timezone: | Mountain (GMT -07:00) |
| Local Time: | 11:55:03 PM |
| Population: | 5,178 [See All] |
| FIPS: | 46121 |
| Land Area: | 1,065 sq mi |
| Water Area: | 29 sq mi |
| Coordinates: | 42.8046, -101.1016 |
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8,507 residents live across 5 ZIPs covering 1,065 sq mi, served by 5 distinct USPS-recognized cities.
Population moved from 9,513 to 8,507 from 2014 to 2024 — a -10.6% change. 1 ZIPs gained residents, 4 lost.
The county's wealthiest ZIP 57570 (Rosebud, $51,788 median) and poorest ZIP 57566 (Parmelee, $14,176) are 16.2 miles apart — a 3.7× income gap across local geography.
Median home values vary 6.9× across this county — from $12,200 in 57566 (Parmelee) to $84,600 in 57555 (Mission).
Density varies 9× across the county — from 4 people/sq mi in 57563 (Okreek) to 33 in 57570 (Rosebud).
Educational attainment ranges from 4.1% bachelor's+ in 57566 (Parmelee) to 22.7% in 57555 (Mission) — the breadth of educational profiles across the area.
Within South Dakota, this is the #53 most populous of 107 counties and ranks #66 for median household income .
Weighted by population, the typical household earns about $39,637 across the county — reflecting what a typical resident sees, not a simple ZIP average.
17.0% of adults age 25+ hold a bachelor's degree or higher (732 of 4,294 reporting).
3 Standard delivery, 2 PO Box only, 0 single-entity Unique ZIPs serve this county.
Median household income spans 3.7× between the wealthiest and poorest ZIPs — a sign of significant intra-county inequality.
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.