ZIP code 84321

ZIP 84321 is a small city in Cache County, Utah, with 49,811 residents counted in the Census American Community Survey 2019-2023 ACS 5-year estimates, which places it #14 of 299 ranked by population — larger than 95% of them. The median age here is 23.8 years against 39.1 nationally, a distinctly younger profile, typical of places with students, military posts or a fast-growing family population. Places under 65,000 residents only appear in the five-year release, never the one-year file, so these values pool sixty months of responses and lag the current year by design.

Households in ZIP 84321 earn a median of $66,262 a year, 15.6% below the national figure of $78,538. Median household income counts every pre-tax dollar arriving at an address — wages, self-employment, Social Security, pensions, interest and public assistance — for everyone living there, so multi-earner households pull the figure up even where individual pay is modest. Poverty reaches 18% of residents here, above the 12.4% national rate.

The typical owner-occupied home in ZIP 84321 is valued at $360,300, 18.8% above the national figure, while median gross rent runs $1,037 a month, 26.2% below the national figure, or roughly $12,444 across a full year. A household on the local median income would put about 18.8% of gross pay toward that rent against the federal 30% cost-burden threshold, so renting here is cheap relative to what people here earn. The home-price-to-income ratio works out to 5.4×, against roughly 3.9× nationally, so buying is harder here than in the average US market. 49.2% of occupied homes are owner-occupied versus 65% nationally, so the market leans more heavily on renters. The rent line includes utilities paid by the tenant, a definition worth remembering when comparing it against a landlord's quoted rate.

A median age of 23.8 means a large student or early-career population; income medians in places like this understate household resources, since many residents are supported from outside the address.

Every value on this page is published directly by the Census for this area — nothing is modelled or interpolated. Small-area estimates still carry wider margins of error than state or national figures, so check the linked ACS tables before relying on them for lending, appraisal or legal work.

ZIP 84321 is tabulated inside Cache County, Utah, one of 18 ZIP areas the Census publishes for that county and 299 across Utah. This is a dense urban ZIP, where a single postal boundary can hold more residents than an entire rural county. County assignment on this page follows the largest share of the ZIP's land area, which matters where a delivery route crosses a county line: mail addressed to 84321 can be handled by a post office in a neighbouring county even though the tabulation area is filed here.

Against its own county, 84321 reports a median household income of $66,262, 25% below the $88,439 county median, and 16% below the $78,550 typical UT ZIP. Owner-occupied homes are valued at a median of $360,300, 7% below the county figure and close to the statewide ZIP median. Rent is reported gross — the contract amount plus tenant-paid utilities — at $1,037 a month, which is why it reads higher than the advertised rent on a listing for the same unit.

Utah charges 4.85% statewide, and local governments overlapping 84321 may add county, city or special-district levies on top. We publish the state floor for this ZIP rather than guessing a combined figure, because ZIP boundaries and taxing-district boundaries were drawn for different purposes and do not line up.

Everything above comes from the Census Bureau American Community Survey 2019-2023 ACS 5-year estimates for this ZIP Code Tabulation Area, with sales tax rates traced to the state revenue agency. Five-year estimates pool sixty months of responses, so they are stable enough to compare 84321 with its neighbours but always trail the current year, and any value the Census suppressed for sample size is shown as unpublished rather than filled in with a model.