| ZIP Codes: | 19 ZIP Codes (14 Standard, 4 PO Box, 1 Unique) [See All] |
| Area Code: | 435 |
| Timezone: | Mountain (GMT -07:00) |
| Local Time: | 2:14:05 PM |
| Population: | 140,046 [See All] |
| FIPS: | 49005 |
| CBSA: | Logan, UT-ID |
| Land Area: | 919 sq mi |
| Water Area: | 8 sq mi |
| Coordinates: | 41.7763, -111.8668 |
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140,046 residents live across 19 ZIPs covering 919 sq mi, served by 16 distinct USPS-recognized cities.
Population moved from 115,954 to 140,046 from 2014 to 2024 — a +20.8% change. 13 ZIPs gained residents, 4 lost.
The county's wealthiest ZIP 84332 (Providence, $117,987 median) and poorest ZIP 84321 (Logan, $69,148) are 7.9 miles apart — a 1.7× income gap across local geography.
Median home values vary 1.6× across this county — from $380,200 in 84320 (Lewiston) to $609,300 in 84325 (Mendon).
Density varies 170× across the county — from 14 people/sq mi in 84328 (Paradise) to 2,459 in 84341 (Logan).
Educational attainment ranges from 25.0% bachelor's+ in 84320 (Lewiston) to 57.7% in 84325 (Mendon) — the breadth of educational profiles across the area.
Within Utah, this is the #6 most populous of 29 counties and ranks #8 for median household income with the #9 fastest decade growth .
Hosts 1 single-entity Unique ZIP: 84322Utah State University .
Weighted by population, the typical household earns about $84,434 across the county — reflecting what a typical resident sees, not a simple ZIP average.
42.2% of adults age 25+ hold a bachelor's degree or higher (30,805 of 72,944 reporting).
14 Standard delivery, 4 PO Box only, 1 single-entity Unique ZIPs serve this county.
Cache County grew 20.8% over the past decade — concentrated in 5 high-growth ZIPs:
| ZIP | City | Type | Population | Median Income | Area (sq mi) | 10-yr Growth |
|---|---|---|---|---|---|---|
| 84321 | Logan | Standard | 51,702 | $69,148 | 276.9 | 14.3% |
| 84341 | Logan | Standard | 25,560 | $69,310 | 10.4 | 21.2% |
| 84335 | Smithfield | Standard | 16,210 | $97,979 | 88.0 | 35.6% |
| 84319 | Hyrum | Standard | 10,931 | $89,189 | 17.4 | 37.4% |
| 84332 | Providence | Standard | 8,954 | $117,987 | 5.3 | 21.2% |
| 84339 | Wellsville | Standard | 6,295 | $112,744 | 59.5 | 31.4% |
| 84318 | Hyde Park | Standard | 5,604 | $113,194 | 41.1 | 36.3% |
| 84320 | Lewiston | Standard | 3,162 | $103,810 | 49.1 | 33.4% |
| 84333 | Richmond | Standard | 3,093 | $108,750 | 105.6 | 7.7% |
| 84325 | Mendon | Standard | 2,525 | $116,094 | 38.2 | 17.2% |
| 84326 | Millville | PO Box | 1,949 | $91,971 | 3.7 | 16.8% |
| 84328 | Paradise | Standard | 1,681 | $113,646 | 116.4 | -0.7% |
| 84327 | Newton | PO Box | 921 | $77,024 | 13.2 | -10.0% |
| 84305 | Clarkston | PO Box | 667 | $64,583 | 58.9 | -18.0% |
| 84338 | Trenton | Standard | 526 | $95,313 | 8.9 | 17.1% |
| 84308 | Cornish | Standard | 260 | $83,333 | 16.9 | -29.3% |
| 84304 | Cache Junction | Standard | 6 | — | 9.8 | — |
| 84322 | Logan | Unique | 0 | — | 0.0 | — |
| 84323 | Logan | PO Box | — | — | 0.0 | — |