City ZIP codes · Idaho
Rexburg, ID ZIP Codes
3 ZIP codes use the postal name Rexburg, Idaho (Census 2020 ZCTAs and GeoNames postal codes, October 2026): 2 residential and 1 for PO boxes or a single organization. Rexburg's most populous ZIP code is 83440, with 51,421 people (ACS 2020-2024); 5% of its land is in the city of Rexburg.
- ACS2020-24
- Census2020
- GeoNames2026
Where are Rexburg's ZIP codes?
Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).
All 2 residential ZIP codes of Rexburg
Source: U.S. Census Bureau, ACS 2020-2024 5-year estimates; 2023 Gazetteer land areas (2020 ZCTAs); town names from simplemaps US ZIP Codes (CC BY 4.0) and GeoNames (CC BY 4.0).
PO Box and single-organization ZIP codes in Rexburg
1 ZIP code named Rexburg has no residential delivery area: post office boxes, or one organization (a large employer, an agency, a university) with its own code. The Census Bureau publishes no figures for them.
| ZIP | County |
|---|---|
| 83441 | Madison County |
Source: GeoNames postal codes (CC BY 4.0); a ZIP code with no Census ZCTA has no residential delivery area.
Which counties do Rexburg's ZIP codes reach?
Rexburg's residential ZIP codes lie in 2 counties: Madison County (2 ZIP codes mainly there), Fremont County (part of a ZIP code).
Which first three digits do Rexburg'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 Rexburg starts with 834.
| Prefix | Sectional center | Here | All codes |
|---|---|---|---|
| 834 | Pocatello, ID (SCF 832) | 3 | 46 |
Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.