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County ZIP codes · Idaho · FIPS 16071

Oneida County, ID ZIP Codes

Oneida County, Idaho has 4 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026), all residential. 2 of the residential ones lie mainly in Oneida County and 2 mainly in a neighboring county; 2 cross the county line.

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Oneida County?

83212 · Arbon: –83243 · Holbrook: –83252 · Malad City: $76k83342 · Malta: $57k8334283252832128324383212 · Arbon: –83243 · Holbrook: –83252 · Malad City: $76k83342 · Malta: $57k8334283252832128324383212 · Arbon: –83243 · Holbrook: –83252 · Malad City: $76k83342 · Malta: $57k83342832528321283243
The residential ZIP codes of Oneida County (whole outlines, including the parts in neighboring counties), shaded by median household income in national fifths (ACS 2020-2024).<$54.1k$98.1k+no figure

Source: U.S. Census Bureau, 2020 ZCTA cartographic boundaries; ACS 2020-2024 5-year estimates (B19013).

All 4 residential ZIP codes in Oneida County

2 ZIP codes lie mainly in Oneida County; 2 more reach into it from a neighboring county and follow the first table.

Residential ZIP codes mainly in Oneida County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
83252 Malad City 4,707 6 $76k $272k 100%
83243 Holbrook 49 0 – – 100%

Partly in Oneida County

Residential ZIP codes mainly in another county that reach at least 1% into Oneida County, by their share here
In this county
83342 Malta 1,231 1 $57k $224k 21%
83212 Arbon 388 2 – $123k 14%

Download the 4 ZIP codes as CSV

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?

2 ZIP codes of Oneida County extend into another county. A ZIP code follows mail routes, not county borders.

Share of each ZIP code's land in Oneida County and in the neighboring counties
ZIPIn OneidaElsewhere
8334221%Cassia County65%; Box Elder County13%
8321214%Power County86%

Source: U.S. Census Bureau, 2020 ZCTA-county relationship file (shares of land area).

Which first three digits do Oneida County's ZIP codes use?

The first three digits of a ZIP code name the sectional center, the mail processing plant that sorts it. Oneida County's ZIP codes use 2 prefixes: 832 and 833.

Three-digit prefixes of Oneida County's ZIP codes, the sectional center for each (USPS labeling list L005, effective October 1, 2026) and how many of the prefix's codes are Oneida County's
PrefixSectional centerHereAll codes
832Pocatello, ID (SCF 832)357
833Boise, ID (SCF 836)139

Source: U.S. Postal Service, labeling list L005 (3-digit ZIP Code prefix groups, SCF sortation), effective October 1, 2026.