County ZIP codes · Oregon · FIPS 41053
Polk County, OR ZIP Codes
Polk County, Oregon has 11 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 6 of the residential ones lie mainly in Polk County and 5 mainly in a neighboring county; 7 cross the county line. Median household income ranges from $57,614 in 97396 (Willamina) to $99,837 in 97101 (Amity) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Polk 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 $69,505 and $88,519.
They carry 11 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 11 residential ZIP codes in Polk County
6 ZIP codes lie mainly in Polk County; 5 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 97304 | Salem | 34,879 | 614 | $98k | $499k | 87% |
| 97338 | Dallas | 23,419 | 188 | $79k | $424k | 100% |
| 97361 | Monmouth | 14,488 | 109 | $70k | $451k | 89% |
| 97351 | Independence | 11,454 | 219 | $89k | $397k | 100% |
| 97344 | Falls City | 1,534 | 133 | $59k | $321k | 100% |
| 97371 | Rickreall | 694 | 22 | – | $625k | 100% |
Partly in Polk County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 97378 | Sheridan | 9,178 | 79 | $80k | $373k | 49% |
| 97347 | Grand Ronde | 1,577 | 33 | $53k | $314k | 45% |
| 97101 | Amity | 3,914 | 78 | $100k | $582k | 36% |
| 97396 | Willamina | 3,446 | 63 | $58k | $351k | 25% |
| 97370 | Philomath | 9,521 | 53 | $88k | $463k | 6% |
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?
7 ZIP codes of Polk County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Polk | Elsewhere |
|---|---|---|
| 97304 | 87% | Yamhill County 13% |
| 97361 | 89% | Benton County 11% |
| 97370 | 6% | Benton County 94% |
| 97378 | 49% | Yamhill County 51% |
| 97101 | 36% | Yamhill County 64% |
| 97396 | 25% | Yamhill County 76% |
| 97347 | 45% | Yamhill County 51%; Tillamook County 4% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
Which first three digits do Polk County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Polk County's ZIP codes use 2 prefixes: 971 and 973.
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.