| 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: | 18,124 [See All] |
| FIPS: | 46065 |
| CBSA: | Pierre, SD |
| Land Area: | 1,351 sq mi |
| Water Area: | 119 sq mi |
| Coordinates: | 44.4916, -100.0681 |
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18,124 residents live across 3 ZIPs covering 1,351 sq mi, served by 3 distinct USPS-recognized cities.
Population moved from 17,622 to 18,124 from 2014 to 2024 — a +2.8% change. 2 ZIPs gained residents, 1 lost.
The county's wealthiest ZIP 57501 (Pierre, $81,791 median) and poorest ZIP 57536 (Harrold, $53,125) are 34.4 miles apart — a 1.5× income gap across local geography.
Median home values vary 2.7× across this county — from $90,000 in 57536 (Harrold) to $245,100 in 57501 (Pierre).
Density varies 45× across the county — from 1 people/sq mi in 57536 (Harrold) to 25 in 57501 (Pierre).
Educational attainment ranges from 27.9% bachelor's+ in 57522 (Blunt) to 39.0% in 57501 (Pierre) — the breadth of educational profiles across the area.
Within South Dakota, this is the #13 most populous of 82 counties and ranks #57 for median household income .
Weighted by population, the typical household earns about $81,077 across the county — reflecting what a typical resident sees, not a simple ZIP average.
38.4% of adults age 25+ hold a bachelor's degree or higher (4,866 of 12,658 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.