County ZIP codes · New Mexico · FIPS 35021
Harding County, NM ZIP Codes
Harding County, New Mexico has 7 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 4 of the residential ones lie mainly in Harding County and 3 mainly in a neighboring county; 4 cross the county line.
- ACS2020-24
- Census2020
Where are the ZIP codes of Harding County?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All 7 residential ZIP codes in Harding County
4 ZIP codes lie mainly in Harding County; 3 more reach into it from a neighboring county and follow the first table.
| In this county | ||||||
|---|---|---|---|---|---|---|
| 88426 | Logan | 837 | 1 | $40k | $123k | 66% |
| 87743 | Roy | 475 | 1 | $45k | $53k | 100% |
| 87733 | Mosquero | 70 | 0 | – | – | 100% |
| 87730 | Mills | 60 | 0 | $49k | $56k | 100% |
Partly in Harding County
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 Harding County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Harding | Elsewhere |
|---|---|---|
| 88415 | 16% | Union County84% |
| 88426 | 66% | Quay County31%; San Miguel County3% |
| 87746 | 6% | San Miguel County94% |
| 88410 | 39% | Union County61% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
Which first three digits do Harding County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Harding County's ZIP codes use 2 prefixes: 877 and 884.
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.