County ZIP codes · Arkansas · FIPS 05143
Washington County, AR ZIP Codes
Washington County, Arkansas has 28 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 20 residential and 8 for PO boxes or a single organization. 14 of the residential ones lie mainly in Washington County and 6 mainly in a neighboring county; 11 cross the county line. Median household income ranges from $51,923 in 72959 (Winslow) to $96,014 in 72704 (Fayetteville) (Census Bureau, ACS 2020-2024).
- ACS2020-24
- Census2020
Where are the ZIP codes of Washington 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 $65,850 and $76,316.
They carry 17 postal town names.
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates (B19013).
All 20 residential ZIP codes in Washington County
14 ZIP codes lie mainly in Washington County; 6 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 72764 | Springdale | 58,719 | 887 | $66k | $250k | 91% |
| 72701 | Fayetteville | 49,835 | 396 | $56k | $355k | 100% |
| 72762 | Springdale | 46,092 | 793 | $82k | $304k | 79% |
| 72703 | Fayetteville | 35,896 | 893 | $61k | $391k | 95% |
| 72704 | Fayetteville | 32,497 | 422 | $96k | $331k | 99% |
| 72730 | Farmington | 11,570 | 557 | $92k | $310k | 100% |
| 72753 | Prairie Grove | 10,744 | 120 | $71k | $243k | 100% |
| 72774 | West Fork | 7,082 | 59 | $76k | $226k | 100% |
| 72744 | Lincoln | 5,520 | 70 | $66k | $187k | 100% |
| 72959 | Winslow | 2,972 | 15 | $52k | $197k | 59% |
| 72717 | Canehill | 1,068 | 25 | $73k | $205k | 100% |
| 72769 | Summers | 907 | 22 | $57k | $156k | 100% |
| 72749 | Morrow | 296 | 254 | – | – | 100% |
| 72729 | Evansville | 154 | 14 | – | – | 100% |
Partly in Washington County
| In this county | ||||||
|---|---|---|---|---|---|---|
| 72727 | Elkins | 6,703 | 43 | $75k | $214k | 32% |
| 72738 | Hindsville | 2,688 | 32 | $86k | $229k | 13% |
| 72761 | Siloam Springs | 24,745 | 217 | $76k | $237k | 5% |
| 72948 | Natural Dam | 334 | 5 | $76k | $217k | 3% |
| 72773 | Wesley | 1,381 | 28 | $39k | $139k | 3% |
| 72734 | Gentry | 8,694 | 107 | $75k | $234k | 1% |
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?
11 ZIP codes of Washington County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Washington | Elsewhere |
|---|---|---|
| 72764 | 91% | Benton County 9% |
| 72762 | 79% | Benton County 21% |
| 72703 | 95% | Madison County 5% |
| 72704 | 99% | Benton County 1% |
| 72761 | 5% | Benton County 95% |
| 72734 | 1% | Benton County 99% |
| 72727 | 32% | Madison County 63%; Franklin County 5% |
| 72959 | 59% | Crawford County 25%; Franklin County 16% |
| 72738 | 13% | Madison County 80%; Benton County 7% |
| 72773 | 3% | Madison County 97% |
| 72948 | 3% | Crawford County 97% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
PO Box and single-organization ZIP codes
Source: GeoNames postal codes (CC BY 4.0).
Which first three digits do Washington County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Washington County's ZIP codes use 2 prefixes: 727 and 729.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 727 | Nw Arkansas, AR (SCF 727) | 26 | 52 |
| 729 | Nw Arkansas, AR (SCF 727) | 2 | 43 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.