| ZIP Codes: | 10 ZIP Codes (3 Standard, 7 PO Box, 0 Unique) [See All] |
| Area Code: | 509 |
| Timezone: | Pacific (GMT -08:00) |
| Local Time: | 11:55:36 PM |
| Population: | 47,120 [See All] |
| FIPS: | 53037 |
| CBSA: | Ellensburg, WA |
| Land Area: | 2,049 sq mi |
| Water Area: | 38 sq mi |
| Coordinates: | 47.1865, -120.8070 |
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47,120 residents live across 10 ZIPs covering 2,049 sq mi, served by 10 distinct USPS-recognized cities.
Population moved from 41,692 to 47,120 from 2014 to 2024 — a +13.0% change. 6 ZIPs gained residents, 4 lost.
The county's wealthiest ZIP 98940 (Ronald, $246,441 median) and poorest ZIP 98943 (South Cle Elum, $66,750) are 16.3 miles apart — a 3.7× income gap across local geography.
Median home values vary 2.8× across this county — from $319,900 in 98934 (Kittitas) to $904,000 in 98068 (Snoqualmie Pass).
Density varies 362× across the county — from 2 people/sq mi in 98068 (Snoqualmie Pass) to 712 in 98943 (South Cle Elum).
Educational attainment ranges from 19.9% bachelor's+ in 98934 (Kittitas) to 62.4% in 98940 (Ronald) — the breadth of educational profiles across the area.
Within Washington, this is the #23 most populous of 39 counties and ranks #4 for median household income with the #15 fastest decade growth .
Weighted by population, the typical household earns about $76,780 across the county — reflecting what a typical resident sees, not a simple ZIP average.
37.0% of adults age 25+ hold a bachelor's degree or higher (11,030 of 29,805 reporting).
3 Standard delivery, 7 PO Box only, 0 single-entity Unique ZIPs serve this county.
Median household income spans 3.7× 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.
One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 98926 | Ellensburg | Standard | 34,353 | $71,137 | 878.9 | 12.2% |
| 98922 | Cle Elum | Standard | 7,688 | $73,603 | 560.5 | 34.1% |
| 98941 | Roslyn | PO Box | 1,076 | $104,800 | 4.3 | 13.6% |
| 98940 | Ronald | PO Box | 858 | $246,441 | 143.0 | 50.0% |
| 98925 | Easton | PO Box | 850 | $97,250 | 147.2 | 47.1% |
| 98934 | Kittitas | PO Box | 775 | $79,063 | 1.2 | -23.9% |
| 98943 | South Cle Elum | PO Box | 579 | $66,750 | 0.8 | -30.0% |
| 98068 | Snoqualmie Pass | PO Box | 482 | $100,096 | 245.3 | 100.8% |
| 98946 | Thorp | Standard | 398 | $121,875 | 58.2 | -32.3% |
| 98950 | Vantage | PO Box | 61 | — | 10.1 | -89.2% |