13,426 residents live across 7 ZIPs covering 1,680 sq mi, served by 7 distinct USPS-recognized cities.
Population moved from 14,093 to 13,426 from 2014 to 2024 — a -4.7% change. 2 ZIPs gained residents, 5 lost.
The county's wealthiest ZIP 57752 (Kyle, $82,604 median) and poorest ZIP 57764 (Oglala, $21,545) are 30.2 miles apart — a 3.8× income gap across local geography.
Density varies 18× across the county — from 1 people/sq mi in 57716 (Batesland) to 24 in 57770 (Pine Ridge).
Educational attainment ranges from 5.0% bachelor's+ in 57772 (Porcupine) to 26.4% in 57752 (Kyle) — the breadth of educational profiles across the area.
Within South Dakota, this is the #15 most populous of 77 counties and ranks #73 for median household income .
Weighted by population, the typical household earns about $53,845 across the county — reflecting what a typical resident sees, not a simple ZIP average.
11.9% of adults age 25+ hold a bachelor's degree or higher (841 of 7,084 reporting).
6 Standard delivery, 1 PO Box only, 0 single-entity Unique ZIPs serve this county.
Median household income spans 3.8× 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.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 57770 | Pine Ridge | Standard | 5,483 | $52,250 | 233.2 | -2.0% |
| 57772 | Porcupine | Standard | 2,493 | $57,785 | 249.2 | 12.3% |
| 57752 | Kyle | Standard | 1,553 | $82,604 | 326.7 | -18.0% |
| 57764 | Oglala | Standard | 1,416 | $21,545 | 532.0 | -12.0% |
| 57794 | Wounded Knee | Standard | 1,191 | — | 63.4 | 23.5% |
| 57756 | Manderson | PO Box | 1,089 | — | 120.4 | -19.3% |
| 57716 | Batesland | Standard | 201 | — | 154.9 | -56.3% |