ZIP codes

ZIP codes in Cache County, Utah

Cache County has 18 ZIP codes, all of them entirely inside it. 140,046 people live in them (ACS 2020–2024).

By the All Map Tools Team

ZIP codes: 18; With 1% or more of their land inside
Entirely inside: 18; 99% or more of their land
Shared with other counties: 0; None crosses the county line
Most populated ZIP: 84321; 51,702 people · Logan
Least populated ZIP: 84304; 6 people · Cache; 1 more with nobody living there
Largest ZIP by land: 84321; 220 sq mi · Logan

Map of the ZIP codes in Cache County

Entirely in the county (99% or more of its land)
Neighboring counties

Open in the interactive tool

Each area is a ZIP code with its number where it fits. Hover over one to see its name.

All ZIP codes in Cache County

18 ZIP codes in Cache County, UT, by number
ZIP code	Main city	Population	Land in the county	Residents in the county
84304	Cache	6	100%	6
84305	Clarkston	667	100%	667
84308	Cornish	260	100%	260
84318	Hyde Park	5,604	100%	5,604
84319	Hyrum	10,931	100%	10,931
84320	Lewiston	3,162	100%	3,162
84321	Logan	51,702	100%	51,702
84322	Logan	0	100%	0
84325	Peter	2,525	100%	2,525
84326	Millville	1,949	100%	1,949
84327	Cache	921	100%	921
84328	Avon	1,681	100%	1,681
84332	Providence	8,954	100%	8,954
84333	Richmond	3,093	100%	3,093
84335	Benson	16,210	100%	16,210
84338	Trenton	526	100%	526
84339	Wellsville	6,295	100%	6,295
84341	North Logan	25,560	100%	25,560

Cities and prefixes

By main city (the city, town or CDP each ZIP shares the most land with), the ones with the most are Cache (2), Logan (2), Avon (1), Benson (1), Clarkston (1), and Cornish (1); 16 places in all.

All 18 start with the same three digits, 843: the prefix of the USPS sorting center that handles them.

Neighboring counties

Each one with its ZIP codes. Those without a page of their own open in the tool.

Tools for this county

ZIP codes by county or city The same ZIP codes on an interactive map, with the list as CSV or to copy County map with cities Its cities, towns and CDPs with their population ZIP codes in a radius The ZIP codes within 10 miles of its center, or any distance you like

Sources

U.S. Census Bureau, 2020 ZCTA to County, ZCTA to Place and ZCTA to Census Tract Relationship Files (and the 2022 County Subdivision to ZCTA file for Connecticut). Public domain.
U.S. Census Bureau, American Community Survey 2020–2024 5-year estimates, table B01003 (population of each ZIP code, census tract and Connecticut town). Public domain.
U.S. Census Bureau, Vintage 2025 Population Estimates (county population) and 2025 Gazetteer Files (land area and interior point of each ZIP code). Public domain.
U.S. Census Bureau, Cartographic Boundary Files: ZCTAs 2020 and counties 2025, 1:500,000; county adjacency file 2025. Public domain.

How we count. ZIP codes here are the Census Bureau’s ZIP Code Tabulation Areas (ZCTAs), the areas it draws to match USPS ZIP codes; ZIPs with no area of their own (PO boxes, single buildings) aren’t included. A ZIP can cross county lines: “Land in the county” is the exact share of its land inside, from the Census relationship files. “Residents in the county” is the whole ZIP for those entirely inside; for shared ones it’s an estimate, spreading the people of each census tract over the land it shares with the ZIP. Population: ACS 2020–2024. Methodology.

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