ZIP Codes of Oneida County, ID

Population & People
Population & People
Total Population
4,756
Household Income
Household Income
Median Income
$76,328
Housing
Housing
Total Housing Units
2,095
Business & Economy
Business & Economy
Total Businesses
98
Employment
Employment
Employment Rate
61.76%
Education
Education
Bachelor's Degree+
26.75%
Source: U.S. Census ACS 2024 5-Year Estimates · rolled up across the 2 ZIPs in this county.
Data Last Updated: July 1, 2026
ZIP Codes:2 ZIP Codes (2 Standard, 0 PO Box, 0 Unique) [See All]
Area Codes:208 / 986
Timezone:Mountain (GMT -07:00)
Local Time:11:53:15 PM
Population:4,756 [See All]
FIPS:16071
CBSA:Brigham City, UT-ID
Land Area:969 sq mi
Water Area:2 sq mi
Coordinates:42.2245, -112.4988
Quick Link:
https://www.zip-codes.com/county/id-oneida.asp
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Owner-dominated county
Just 11.7% of homes are rentals — strong homeownership culture.

Standout ZIPs in this County


Most Populous
Malad City · 4,707 people
99.0% of county total
Highest Income
Malad City · $76,328 median
1.0× county average
Largest Land Area
Malad City · 710.5 sq mi
Spans the most ground
Fastest Growth
Malad City · 13.4% (10-yr)
4,149 → 4,707 residents
Most Educated
Malad City · 27.1% bachelor's+
835 of 3,081 adults 25+

Things worth knowing about Oneida County


4,756 residents live across 2 ZIPs covering 969 sq mi, served by 2 distinct USPS-recognized cities.

Population moved from 4,241 to 4,756 from 2014 to 2024 — a +12.1% change. 1 ZIPs gained residents, 1 lost.

The county's wealthiest ZIP 83252 (Malad City, $76,328 median) and poorest ZIP 83252 (Malad City, $76,328) are 0.0 miles apart — a 1.0× income gap across local geography.

Within Idaho, this is the #40 most populous of 46 counties and ranks #11 for median household income with the #19 fastest decade growth .

Weighted by population, the typical household earns about $76,328 across the county — reflecting what a typical resident sees, not a simple ZIP average.

26.8% of adults age 25+ hold a bachelor's degree or higher (835 of 3,121 reporting).

2 Standard delivery, 0 PO Box only, 0 single-entity Unique ZIPs serve this county.

Stories about Oneida County


Big & sparse

A frontier county — vast land area with only a few residents per square mile. Daily life looks very different here than in the country's denser counties.

Total area
969
square miles
Avg density
4.9
people per sq mi
Population
4,756
across 2 ZIPs
Malad City
710.5 sq mi
4,707 residents
Holbrook
258.1 sq mi
49 residents

Single-ZIP anchor

One ZIP holds the majority of this county's population — a sign of a county built around a single city or town.

Malad City

All ZIP Codes in Oneida County


ZIPCityTypePopulationMedian IncomeArea (sq mi)10-yr Growth
83252Malad CityStandard4,707$76,328710.513.4%
83243HolbrookStandard49258.1-46.7%

Adjacent & Nearby Counties