| ZIP Codes: | 3 ZIP Codes (3 Standard, 0 PO Box, 0 Unique) [See All] |
| Area Codes: | 605 / 701 |
| Timezone: | Central (GMT -06:00) |
| Local Time: | 11:55:03 PM |
| Population: | 966 [See All] |
| FIPS: | 46089 |
| CBSA: | Aberdeen, SD |
| Land Area: | 1,160 sq mi |
| Water Area: | 17 sq mi |
| Coordinates: | 46.0706, -99.2445 |
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1,852 residents live across 3 ZIPs covering 1,160 sq mi, served by 3 distinct USPS-recognized cities.
Population moved from 2,189 to 1,852 from 2014 to 2024 — a -15.4% change. 1 ZIPs gained residents, 2 lost.
The county's wealthiest ZIP 57457 (Long Lake, $140,417 median) and poorest ZIP 57437 (Eureka, $49,276) are 22.9 miles apart — a 2.8× income gap across local geography.
Median home values vary 1.1× across this county — from $75,400 in 57456 (Leola) to $86,700 in 57437 (Eureka).
Density varies 3× across the county — from 1 people/sq mi in 57457 (Long Lake) to 2 in 57437 (Eureka).
Educational attainment ranges from 20.5% bachelor's+ in 57457 (Long Lake) to 40.7% in 57456 (Leola) — the breadth of educational profiles across the area.
Within South Dakota, this is the #56 most populous of 64 counties and ranks #64 for median household income .
Weighted by population, the typical household earns about $64,198 across the county — reflecting what a typical resident sees, not a simple ZIP average.
27.3% of adults age 25+ hold a bachelor's degree or higher (384 of 1,407 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.
Mcpherson County lost 16.7% of residents between 2014 and 2024. ZIPs that shed the largest share: