Cache County area

Population and density of Cache County

The Census Bureau estimates that 145,000 people lived in Cache County on July 1, 2025. That ranks #477 of 3,222 county equivalents nationally and #6 of 29 in Utah. Since the April 1, 2020 estimates base of 133,158, the population has grown by 11,842 (+8.9%), compared with +8.2% for Utah as a whole.

With 1,164.7 square miles of land, that is 124 people per square mile (48 per km²), placing Cache County #857 nationally for density and #5 in Utah. The median county equivalent has 47 people per square mile; the Utah median is 11. Put another way, there are about 5.1 acres of land per resident.

U.S. Census Bureau, Vintage 2025 population estimates. Estimates are revised each year and are not decennial census counts. Density divides the whole population by the whole county’s land area, so it describes an average, not how settlement is distributed within the county. Population sources and methods.

Cities and towns in Cache County

19 incorporated places lie at least partly in Cache County. Together they are home to 137,232 people (94.6%); the other 7,768 (5.4%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is Logan city, with 55,576 residents in the county. By land, Lewiston city is the largest at 26 mi². Among places with at least 1,000 residents in 2020, Nibley city grew fastest since then (+22.4%).

Population: U.S. Census Bureau Vintage 2025 subcounty estimates, counting only the part of each place inside Cache County. Land: 2026 Census Gazetteer, for the whole place even where it extends into other counties. How communities are listed.

Metropolitan area

Cache County is a central county of the Logan, UT-ID Metropolitan Statistical Area. Its 2 county equivalents have 160,889 residents on 1,827.7 square miles of land; Cache County accounts for 63.7% of the land and 90.1% of the residents. By combined land it ranks #172 of 393 metropolitan areas, and #274 by population.

ZIP codes

18 ZIP Code Tabulation Areas have land in Cache County, and each lies mostly inside the county.

843048430584308843188431984320843218432284325843268432784328843328433384335843388433984341

ZIP Code Tabulation Areas are the Census Bureau’s approximations of USPS ZIP Code service areas, from the 2020 Census relationship files. Post-office-box and single-address ZIP Codes have no tabulation area.

Counties bordering Cache County

Cache County shares a land border with 5 county equivalents, including 2 in Idaho. It has more land than 3 of them. The largest neighbor is Box Elder County (5,781.3 mi²) and the smallest is Weber County (611 mi²). Together with its neighbors, Cache County forms a block of 10,447.8 mi² of land, of which it holds 11.1%.

How big is Cache County compared with U.S. states?

Cache County has more land than 1 of the 50 states. It is about 1.1 times the land area of Rhode Island (1,033.9 mi²), while Delaware, the next larger state, has 1.7 times as much land (1,948.6 mi²). Utah’s county land could hold about 71 areas the size of Cache County.

Another way to picture it: the same land area would fill a square about 34.1 miles (54.9 km) on each side. Real county shapes are rarely square, so this is a scale reference rather than a width or driving distance.

State figures are the sums of each state’s county-equivalent land measurements in the same Census release, so states and counties are compared on the same basis. Published state totals can differ slightly because of rounding. Compare all states · Counties bigger than entire states.

What stands out about Cache County?

Cache County has more land than 2,693 of the other 3,221 county equivalents in the dataset.

A median is the middle county-equivalent measurement, not the average of the largest and smallest. All three bars use the same linear scale. Very small areas may appear as a thin sliver; the labels retain their values.

Does including water change its rank?

Using land plus water places Cache County at #606 nationally by total area, 77 places farther from the top than its land rank. Other county equivalents gain more area when their water measurements are included.

Its water share is 0.7%, compared with a national county-equivalent median of 1.2% — 0.5 percentage points lower. This describes the statistical geography’s land/water mix, not flood exposure or developable land.

Closest positions in the national land ranking

These entries sit immediately beside Cache County in the national ranking. They can be in different states and are not necessarily geographic neighbors.

Calculated from the same Census release as the area table. Total-area order uses original ALAND + AWATER; water shares and chart labels use published square miles. Calculation details.