| ZIP Codes: | 5 ZIP Codes (5 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Code: | 605 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 2:13:43 PM |
| Population: | 5,439 [See All] |
| FIPS: | 46087 |
| CBSA: | Sioux Falls, SD-MN |
| Land Area: | 606 sq mi |
| Water Area: | 4 sq mi |
| Coordinates: | 43.6798, -97.4027 |
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5,439 residents live across 5 ZIPs covering 606 sq mi, served by 5 distinct USPS-recognized cities.
Population moved from 5,683 to 5,439 from 2014 to 2024 — a -4.3% change. 3 ZIPs gained residents, 2 lost.
The county's wealthiest ZIP 57012 (Canistota, $94,375 median) and poorest ZIP 57319 (Bridgewater, $69,792) are 10.1 miles apart — a 1.4× income gap across local geography.
Median home values vary 2.0× across this county — from $170,700 in 57319 (Bridgewater) to $348,000 in 57048 (Montrose).
Density varies 4× across the county — from 4 people/sq mi in 57374 (Spencer) to 13 in 57012 (Canistota).
Educational attainment ranges from 27.7% bachelor's+ in 57048 (Montrose) to 31.8% in 57319 (Bridgewater) — the breadth of educational profiles across the area.
Within South Dakota, this is the #34 most populous of 82 counties and ranks #22 for median household income .
Weighted by population, the typical household earns about $83,802 across the county — reflecting what a typical resident sees, not a simple ZIP average.
29.7% of adults age 25+ hold a bachelor's degree or higher (1,077 of 3,623 reporting).
5 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.