| ZIP Codes: | 8 ZIP Codes (7 Standard, 1 PO Box, 0 Unique) [See All] |
| Area Code: | 509 |
| Timezone: | Pacific (GMT -08:00) |
| Local Time: | 2:14:17 PM |
| Population: | 62,319 [See All] |
| FIPS: | 53071 |
| CBSA: | Walla Walla, WA |
| Land Area: | 1,474 sq mi |
| Water Area: | 29 sq mi |
| Coordinates: | 46.1719, -118.4932 |
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62,319 residents live across 8 ZIPs covering 1,474 sq mi, served by 8 distinct USPS-recognized cities.
Population moved from 59,543 to 62,319 from 2014 to 2024 — a +4.7% change. 6 ZIPs gained residents, 2 lost.
The county's wealthiest ZIP 99323 (Burbank, $93,092 median) and poorest ZIP 99324 (College Place, $62,839) are 24.7 miles apart — a 1.5× income gap across local geography.
Median home values vary 1.9× across this county — from $237,200 in 99348 (Prescott) to $454,500 in 99360 (Touchet).
Density varies 1416× across the county — from 3 people/sq mi in 99348 (Prescott) to 3,650 in 99324 (College Place).
Educational attainment ranges from 10.1% bachelor's+ in 99348 (Prescott) to 36.5% in 99324 (College Place) — the breadth of educational profiles across the area.
Within Washington, this is the #21 most populous of 39 counties and ranks #18 for median household income .
Weighted by population, the typical household earns about $73,486 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 (12,282 of 41,308 reporting).
7 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.
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 |
|---|---|---|---|---|---|---|
| 99362 | Walla Walla | Standard | 42,853 | $72,474 | 277.9 | 2.1% |
| 99324 | College Place | Standard | 10,137 | $62,839 | 2.8 | 9.3% |
| 99323 | Burbank | Standard | 4,082 | $93,092 | 133.5 | 18.3% |
| 99361 | Waitsburg | Standard | 1,992 | $91,367 | 220.5 | 24.5% |
| 99348 | Prescott | Standard | 1,633 | $79,167 | 633.4 | -4.4% |
| 99360 | Touchet | Standard | 1,350 | $93,036 | 205.8 | 0.4% |
| 99363 | Wallula | PO Box | 145 | — | 0.1 | 590.5% |
| 99329 | Dixie | Standard | 127 | — | 0.3 | -33.9% |