County ZIP codes · Oregon · FIPS 41059
Umatilla County, OR ZIP Codes
Umatilla County, Oregon has 14 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 13 of the residential ones lie mainly in Umatilla County and 1 mainly in a neighboring county; 4 cross the county line. Median household income ranges from $54,786 in 97862 (Milton Freewater) to $91,813 in 97868 (Pilot Rock) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Umatilla County?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
How different are its ZIP codes?
The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $57,451 and $72,474.
They carry 14 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 14 residential ZIP codes in Umatilla County
13 ZIP codes lie mainly in Umatilla County; 1 more reaches into it from a neighboring county and follows the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 97838 | Hermiston | 28,512 | 141 | $70k | $307k | 74% |
| 97801 | Pendleton | 21,575 | 43 | $72k | $293k | 100% |
| 97862 | Milton Freewater | 12,313 | 42 | $55k | $275k | 100% |
| 97882 | Umatilla | 7,976 | 423 | $69k | $245k | 100% |
| 97875 | Stanfield | 2,410 | 41 | $58k | $209k | 100% |
| 97868 | Pilot Rock | 1,598 | 4 | $92k | $218k | 100% |
| 97813 | Athena | 1,508 | 28 | $76k | $241k | 100% |
| 97886 | Weston | 1,221 | 8 | $93k | $253k | 100% |
| 97826 | Echo | 1,178 | 4 | $59k | $424k | 86% |
| 97810 | Adams | 759 | 3 | $69k | $281k | 100% |
| 97835 | Helix | 608 | 4 | $132k | $233k | 100% |
| 97880 | Ukiah | 248 | 1 | – | – | 85% |
| 97859 | Meacham | 95 | 1 | $61k | $173k | 100% |
Partly in Umatilla County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 99362 | Walla Walla | 42,853 | 141 | $73k | $430k | 8% |
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; county shares by land area (Census 2020 ZCTA-county relationship file).
Which ZIP codes cross the county line?
4 ZIP codes of Umatilla County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Umatilla | Elsewhere |
|---|---|---|
| 99362 | 8% | Walla Walla County 92% |
| 97838 | 74% | Morrow County 26% |
| 97826 | 86% | Morrow County 14% |
| 97880 | 85% | Grant County 15% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
Which first three digits do Umatilla County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Umatilla County's ZIP codes use 2 prefixes: 978 and 993.
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.