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County ZIP codes · Idaho · FIPS 16065

Madison County, ID ZIP Codes

Madison County, Idaho has 8 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 7 residential and 1 for PO boxes or a single organization. 5 of the residential ones lie mainly in Madison County and 2 mainly in a neighboring county; 6 cross the county line. Median household income ranges from $65,590 in 83443 (Ririe) to $82,731 in 83434 (Menan) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Madison County?

83434 · Menan: $83k83436 · Newdale: $80k83440 · Rexburg: $58k83443 · Ririe: $66k83448 · Sugar City: $76k83451 · Teton: $68k83460 · Rexburg: –83443834408343683434834488345183434 · Menan: $83k83436 · Newdale: $80k83440 · Rexburg: $58k83443 · Ririe: $66k83448 · Sugar City: $76k83451 · Teton: $68k83460 · Rexburg: –834438344083436834348344883434 · Menan: $83k83436 · Newdale: $80k83440 · Rexburg: $58k83443 · Ririe: $66k83448 · Sugar City: $76k83451 · Teton: $68k83460 · Rexburg: –8344383440834368343483448
The residential ZIP codes of Madison 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).

How different are its ZIP codes?

They carry 6 postal town names: Rexburg, Sugar City, Menan, Ririe, Teton, Newdale.

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

All 7 residential ZIP codes in Madison County

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

Residential ZIP codes mainly in Madison County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
83440 Rexburg 51,421 283 $58k $419k 96%
83448 Sugar City 3,365 117 $76k $382k 98%
83451 Teton 993 60 $68k $259k 67%
83436 Newdale 778 8 $80k $337k 76%
83460 Rexburg 56 195 – – 100%

Partly in Madison County

Residential ZIP codes mainly in another county that reach at least 1% into Madison County, by their share here
In this county
83434 Menan 1,816 42 $83k $277k 28%
83443 Ririe 1,364 7 $66k $248k 1%

Download the 8 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?

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

Share of each ZIP code's land in Madison County and in the neighboring counties
ZIPIn MadisonElsewhere
8344096%Fremont County 4%
8344898%Fremont County 2%
8343428%Jefferson County 72%
834431%Bonneville County 95%; Jefferson County 4%
8345167%Fremont County 33%
8343676%Teton County 18%; Fremont County 6%

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

PO Box and single-organization ZIP codes

ZIP codes in Madison County without a residential area (GeoNames postal codes)
ZIPPostal name
83441Rexburg

Source: GeoNames postal codes (CC BY 4.0).

Which first three digits do Madison 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 Madison County starts with 834.

Three-digit prefixes of Madison 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 Madison County's
PrefixSectional centerHereAll codes
834 Pocatello, ID (SCF 832) 8 46

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