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County ZIP codes · Utah · FIPS 49005

Cache County, UT ZIP Codes

Cache County, Utah has 19 ZIP codes (Census 2020 ZCTA-county file; GeoNames postal codes, October 2026): 18 residential and 1 for PO boxes or a single organization. Median household income ranges from $69,148 in 84321 (Logan) to $117,987 in 84332 (Providence) (Census Bureau, ACS 2020-2024).

  • ACS2020-24
  • Census2020

Where are the ZIP codes of Cache County?

84304 · Cache Junction: –84305 · Clarkston: $65k84308 · Cornish: $83k84318 · Hyde Park: $113k84319 · Hyrum: $89k84320 · Lewiston: $104k84321 · Logan: $69k84322 · Logan: –84325 · Mendon: $116k84326 · Millville: $92k84327 · Newton: $77k84328 · Paradise: $114k84332 · Providence: $118k84333 · Richmond: $109k84335 · Smithfield: $98k84338 · Trenton: $95k84339 · Wellsville: $113k84341 · Logan: $69k84321843198433584339843058432884320843258433384327843088433884341843048431884304 · Cache Junction: –84305 · Clarkston: $65k84308 · Cornish: $83k84318 · Hyde Park: $113k84319 · Hyrum: $89k84320 · Lewiston: $104k84321 · Logan: $69k84322 · Logan: –84325 · Mendon: $116k84326 · Millville: $92k84327 · Newton: $77k84328 · Paradise: $114k84332 · Providence: $118k84333 · Richmond: $109k84335 · Smithfield: $98k84338 · Trenton: $95k84339 · Wellsville: $113k84341 · Logan: $69k84321843198433584339843058432884320843258433384327843088433884341843048431884304 · Cache Junction: –84305 · Clarkston: $65k84308 · Cornish: $83k84318 · Hyde Park: $113k84319 · Hyrum: $89k84320 · Lewiston: $104k84321 · Logan: $69k84325 · Mendon: $116k84326 · Millville: $92k84327 · Newton: $77k84328 · Paradise: $114k84332 · Providence: $118k84333 · Richmond: $109k84335 · Smithfield: $98k84338 · Trenton: $95k84339 · Wellsville: $113k84341 · Logan: $69k84321843198433584339843058432884320843258433384327
The residential ZIP codes of Cache 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?

The middle half of its ranked ZIP codes (1,000+ people living in households) report median household incomes between $89,189 and $112,744.

They carry 16 postal town names.

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

All 18 residential ZIP codes in Cache County

Residential ZIP codes mainly in Cache County, largest first; "In this county" is the share of the ZIP's land in the county
In this county
84321 Logan 51,702 235 $69k $401k 100%
84341 Logan 25,560 2,393 $69k $466k 100%
84335 Smithfield 16,210 248 $98k $448k 100%
84319 Hyrum 10,931 108 $89k $425k 100%
84332 Providence 8,954 2,240 $118k $516k 100%
84339 Wellsville 6,295 101 $113k $480k 100%
84318 Hyde Park 5,604 1,004 $113k $567k 100%
84320 Lewiston 3,162 67 $104k $380k 100%
84333 Richmond 3,093 134 $109k $399k 100%
84325 Mendon 2,525 59 $116k $609k 100%
84326 Millville 1,949 544 $92k $495k 100%
84328 Paradise 1,681 35 $114k $587k 100%
84327 Newton 921 55 $77k $388k 100%
84305 Clarkston 667 12 $65k $339k 100%
84338 Trenton 526 55 $95k $358k 100%
84308 Cornish 260 19 $83k $309k 100%
84304 Cache Junction 6 1 – – 100%
84322 Logan no residents 0 – – 100%

Download the 19 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).

PO Box and single-organization ZIP codes

ZIP codes in Cache County without a residential area (GeoNames postal codes)
ZIPPostal name
84323Logan

Source: GeoNames postal codes (CC BY 4.0).

Which first three digits do Cache 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 Cache County starts with 843.

Three-digit prefixes of Cache 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 Cache County's
PrefixSectional centerHereAll codes
843 Salt Lake City, UT (SCF 840) 19 40

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