| ZIP Codes: | 11 ZIP Codes (10 Standard, 1 PO Box, 0 Unique) [See All] |
| Area Code: | 605 |
| Timezone: | Mountain (GMT -07:00) |
| Local Time: | 11:55:03 PM |
| Population: | 27,829 [See All] |
| FIPS: | 46093 |
| CBSA: | Rapid City, SD |
| Land Area: | 3,435 sq mi |
| Water Area: | 11 sq mi |
| Coordinates: | 44.5240, -102.8317 |
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27,829 residents live across 11 ZIPs covering 3,435 sq mi, served by 11 distinct USPS-recognized cities.
Population moved from 24,803 to 27,752 from 2014 to 2024 — a +11.9% change. 9 ZIPs gained residents, 1 lost.
The county's wealthiest ZIP 57769 (Piedmont, $94,375 median) and poorest ZIP 57787 (Union Center, $53,750) are 36.9 miles apart — a 1.8× income gap across local geography.
Median home values vary 5.9× across this county — from $61,800 in 57787 (Union Center) to $367,400 in 57769 (Piedmont).
Density varies 749× across the county — from 1 people/sq mi in 57787 (Union Center) to 619 in 57741 (Fort Meade).
Educational attainment ranges from 18.0% bachelor's+ in 57626 (Faith) to 40.9% in 57706 (Ellsworth Afb) — the breadth of educational profiles across the area.
Within South Dakota, this is the #7 most populous of 82 counties and ranks #40 for median household income with the #11 fastest decade growth .
Weighted by population, the typical household earns about $73,766 across the county — reflecting what a typical resident sees, not a simple ZIP average.
26.9% of adults age 25+ hold a bachelor's degree or higher (5,124 of 19,068 reporting).
10 Standard delivery, 1 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.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 57785 | Sturgis | Standard | 10,874 | $63,897 | 568.4 | 14.6% |
| 57718 | Black Hawk | Standard | 7,937 | $84,162 | 26.0 | 12.2% |
| 57769 | Piedmont | Standard | 4,029 | $94,375 | 136.5 | 15.5% |
| 57706 | Ellsworth Afb | Standard | 2,787 | $57,162 | 7.1 | 1.5% |
| 57626 | Faith | Standard | 979 | $68,036 | 1,017.3 | 1.1% |
| 57787 | Union Center | Standard | 487 | $53,750 | 589.1 | 15.7% |
| 57748 | Howes | Standard | 369 | — | 279.0 | 15.7% |
| 57741 | Fort Meade | PO Box | 141 | — | 0.2 | 85.5% |
| 57792 | White Owl | Standard | 114 | $103,567 | 144.7 | 86.9% |
| 57737 | Enning | Standard | 77 | — | 61.1 | — |
| 57758 | Mud Butte | Standard | 35 | — | 605.2 | -77.7% |