Jefferson County, ID ZIP codes
There are 7 ZIP codes in Jefferson County, ID, in 7 towns, from 83425 to 83450. The largest are 83442 (Rigby), 83434 (Menan) and 83444 (Roberts).
The county seat is Rigby.
- ZIP codes
- 7
- Towns
- 7
- County seat
- Rigby
- County FIPS
16051- State
- Idaho
- Population
- 33,154
- Median household income
- $86,679
- Land area
- 1,094 sq mi
- Metro area
- Idaho Falls
Jefferson County ZIP codes by town
Each ZIP code is listed under the county most of its land lies in and the town the Postal Service names it for; a ZIP code's own page shows exactly how it is split.
Map of Jefferson County ZIP codes
The ZIP codes of Jefferson County, shaded. Outlines are Census ZIP Code Tabulation Areas (2020), which approximate the mail routes; PO-box and single-address codes have no area and are not drawn. Click any area to open its ZIP code.
Jefferson County in numbers
About 33,154 people live in Jefferson County, in 10,199 households, the 12th most populous of Idaho's 44 counties. The median household income is $86,679 a year, 11% above the Idaho median of $77,800 (US: $80,734). The median owner-occupied home is valued at $408,400 (about the same as the Idaho median), and median gross rent is $1,138 a month. The median age is 32.8; 27.4% of adults 25 and over hold a bachelor's degree or higher (31.8% across Idaho); the average commute takes 25 minutes.
| Population | 33,154 |
|---|---|
| Households | 10,199 |
| Median age | 32.8 |
| Median household income | $86,679 |
| Median home value | $408,400 |
| Median gross rent | $1,138 |
| Bachelor's degree or higher | 27.4% |
| Mean commute | 25.1 min |
| Population density | 30 / sq mi |
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates. Survey estimates carry margins of error, wider for small places. Sources and methods.
Largest towns in Jefferson County
| Town | ZIP codes | Population |
|---|---|---|
| Rigby | 1 | 5,404 |
| Terreton | 1 | 1,207 |
| Menan | 1 | 876 |
| Roberts | 1 | 609 |
| Monteview | 1 | 600 |
| Lewisville | 1 | 453 |
| Hamer | 1 | 59 |
Population of the census place of that name where there is one, otherwise of the ZIP codes the Postal Service addresses by it. A town's ZIP codes can reach past the county line.
Neighbouring counties
Counties that share a ZIP code with Jefferson County.
Not sure you are in Jefferson County? What county am I in? answers from your location, near a county line included.
Every ZIP code in Jefferson County, with figures
| ZIP | City | Type | Population | Median income | Median home |
|---|---|---|---|---|---|
83425 | Hamer , ID | Standard | 622 | $80,833 | $227,200 |
83431 | Lewisville , ID | Standard | 1,045 | $90,833 | $241,700 |
83434 | Menan , ID | Standard | 1,816 | $82,731 | $277,400 |
83435 | Monteview , ID | Standard | 600 | $73,750 | $221,000 |
83442 | Rigby , ID | Standard | 25,609 | $88,260 | $449,300 |
83444 | Roberts , ID | Standard | 1,261 | $88,438 | $263,000 |
83450 | Terreton , ID | Standard | 1,207 | $70,046 | $231,300 |
Cite this page
zipcodes.pro. “Jefferson County ZIP codes.” Data release 2026-10-12. Retrieved 2026-10-20. https://zipcodes.pro/state/id/county/jefferson
Underlying data is public domain or openly licensed — sources, vintages and licences.