County ZIP codes · South Dakota · FIPS 46065
Hughes County, SD ZIP Codes
Hughes County, South Dakota has 3 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 3 of the residential ones extend into a neighboring county.
- ACS2020-24
- Census2020
Where are the ZIP codes of Hughes County?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All 3 residential ZIP codes in Hughes 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?
3 ZIP codes of Hughes County extend into another county. A ZIP code follows mail routes, not county borders.
| ZIP | In Hughes | Elsewhere |
|---|---|---|
| 57501 | 58% | Sully County 42% |
| 57522 | 69% | Sully County 31% |
| 57536 | 71% | Sully County 29% |
Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).
Which first three digits do Hughes County's ZIP codes use?
The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Every ZIP code of Hughes County starts with 575.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 575 | Dakota Central, SD (SCF 572) | 3 | 43 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.