Juab County area

Juab County, Utah covers 3,405.8 square miles: 3,391.8 square miles of land and 14 square miles of water. Its county seat is Nephi. An estimated 13,567 people lived there in 2025.

Official Census measurements · GEOID 490232026 Gazetteer · retrieved September 27, 2026
Land area3,391.8 mi²
Water area14 mi²
Population (2025)13,567
People per mi²4

County outline

Generalized outline of Juab County, Utah
2025 Census cartographic boundary, fitted to this frame. County maps are not at a common scale. The 2026 area measurements below come from the separate Gazetteer release. Map source and limitations.

Where Juab County is located

Juab County highlighted on a map of all U.S. county equivalents. About the maps

Area breakdown

Land accounts for 99.6% of Juab County’s measured area and water for 0.4%. Its combined area converts to 8,821 square kilometers or approximately 2,179,723 acres.

Green: land · blue: water

MeasurementSquare milesSquare kilometersAcres
Land3,391.8128,784.7532,170,759.7
Water14.00536.2738,963.2
Total3,405.8178,821.0262,179,722.9

How Juab County compares

By original Census land area, Juab County ranks #10 of 29 in Utah and #148 of 3,222 nationally. National rankings include the 50 states, District of Columbia, and Puerto Rico.

Its land area is 1.397 times the Utah county-equivalent median of 2,427.6 square miles. It accounts for 4.1% of the combined county land area in the state.

See the complete Utah ranking · What counts as a county equivalent?

Population and density of Juab County

The Census Bureau estimates that 13,567 people lived in Juab County on July 1, 2025. That ranks #2,256 of 3,222 county equivalents nationally and #19 of 29 in Utah. Since the April 1, 2020 estimates base of 11,780, the population has grown by 1,787 (+15.2%), compared with +8.2% for Utah as a whole.

With 3,391.8 square miles of land, that is 4 people per square mile (1.5 per km²), placing Juab County #2,906 nationally for density and #18 in Utah. The median county equivalent has 47 people per square mile; the Utah median is 11. Put another way, there are about 160 acres of land per resident.

Estimated population, 2020–2025 · line scaled to this county’s own range
July 1202020212022202320242025
Estimate11,82112,21012,57313,02813,32413,567
Change—+389+363+455+296+243

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 Juab County

6 incorporated places lie at least partly in Juab County. Together they are home to 12,135 people (89.4%); the other 1,432 (10.6%) live outside any incorporated place, in unincorporated communities and rural areas.

The largest is Nephi city, with 7,488 residents in the county. By land, Santaquin city is the largest at 10.6 mi² across all its counties. Among places with at least 1,000 residents in 2020, Nephi city grew fastest since then (+16.2%).

Incorporated placePopulation 2025Since 2020Land mi²
Nephi cityCounty seat7,488+16.2%5.54
Mona city1,964+11.3%2.74
Rocky Ridge town1,078+26.2%1.714
Levan town933+7.5%0.807
Eureka city663+0.3%1.449
Santaquin cityAlso in 1 other county90%10.6

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

Metropolitan area

Juab County is an outlying county of the Provo-Orem-Lehi, UT Metropolitan Statistical Area. Its 2 county equivalents have 773,426 residents on 5,396.3 square miles of land; Juab County accounts for 62.9% of the land and 1.8% of the residents. By combined land it ranks #44 of 393 metropolitan areas, and #82 by population. It belongs to the Salt Lake City-Provo-Orem, UT-ID Combined Statistical Area.

County equivalentPopulation 2025Land mi²
Utah County759,8592,004.5
Juab County13,5673,391.8

ZIP codes

6 ZIP Code Tabulation Areas have land in Juab County; 4 of them have most of their land inside the county, and the others mainly cover neighboring areas.

840228403484628846398464584648

ZIP Code Tabulation Areas are the Census Bureau’s approximations of USPS ZIP Code service areas, from the 2020 Census relationship files. Lighter codes have less than half of their land in this county. Post-office-box and single-address ZIP Codes have no tabulation area.

Counties bordering Juab County

Juab County shares a land border with 5 county equivalents, including 1 in Nevada. It has more land than 2 of them. The largest neighbor is White Pine County (8,886.7 mi²) and the smallest is Sanpete County (1,589.8 mi²). Together with its neighbors, Juab County forms a block of 29,698.5 mi² of land, of which it holds 11.4%.

Map of Juab County and the 5 county equivalents that border it Millard County, Utah: 6,785.5 mi² landTooele County, Utah: 7,040.3 mi² landSanpete County, Utah: 1,589.8 mi² landUtah County, Utah: 2,004.5 mi² landWhite Pine County, Nevada: 8,886.7 mi² land
Juab County (dark) and its bordering county equivalents. Select a neighbor to open its profile. Drawn from the 2025 Census cartographic boundaries in an equal-area projection. How borders are determined.
Bordering county equivalentLand mi²Size vs. JuabCompare
White Pine CountyNevada8,886.72.6× largerCompare
Tooele County7,040.32.1× largerCompare
Millard County6,785.52× largerCompare
Utah County2,004.51.7× smallerCompare
Sanpete County1,589.82.1× smallerCompare

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

Juab County has more land than 2 of the 50 states. It is about 1.7 times the land area of Delaware (1,948.6 mi²), while Connecticut, the next larger state, has 1.4 times as much land (4,842.5 mi²). Utah’s county land could hold about 24 areas the size of Juab County.

Land area: Juab County and the closest-sized states
Delaware1,948.6 mi²
Juab County3,391.8 mi²
Connecticut4,842.5 mi²

Another way to picture it: the same land area would fill a square about 58.2 miles (93.7 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 Juab County?

Juab County has more land than 3,074 of the other 3,221 county equivalents in the dataset.

Land area compared with the typical county equivalent
Juab County3,391.8 mi²
Utah median2,427.6 mi²
National median604.5 mi²

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 Juab County at #159 nationally by total area, 11 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 0.4%, compared with a national county-equivalent median of 1.2% — 0.8 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 Juab County in the national ranking. They can be in different states and are not necessarily geographic neighbors.

Land rankCounty equivalentLand mi²Comparison
#147Penobscot County, Maine3,397Compare
#148Juab County, Utah3,391.8This county
#149Webb County, Texas3,361.5Compare

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.

Representative coordinates

The Census internal point is 39.714120, -112.790471. It represents a location inside the geography; it is not necessarily the centroid or the address of a courthouse.

Source and precision

U.S. Census Bureau, 2026 Gazetteer Files, Counties. Original ALAND: 8,784,753,330 m²; AWATER: 36,271,580 m². Rankings use ALAND; exact ties use ascending GEOID. Tables preserve Census-published square miles to three decimals, with conversions based on those values.

Download the official county source ZIP ↗ · Methodology

Common questions

How big is Juab County?

Juab County, Utah has 3,391.8 square miles (8,784.8 km²) of land and 14 square miles of water, for a total area of 3,405.8 square miles. It ranks #148 of 3,222 U.S. county equivalents by land area.

Is Juab County the largest county in Utah?

No. Juab County ranks #10 of 29 in Utah by land area. The largest is San Juan County, with 7,823.7 square miles of land.

What counties border Juab County?

Juab County shares a land border with Millard County, Tooele County, Sanpete County, Utah County, and White Pine County, Nevada.

What is the population of Juab County?

The Census Bureau estimates Juab County had 13,567 residents on July 1, 2025, ranking #2,256 of 3,222 county equivalents. That is 4 people per square mile of land.

What is the county seat of Juab County?

The county seat of Juab County is Nephi.

What cities and towns are in Juab County?

Juab County has 6 incorporated places. The most populous five are Nephi city, Mona city, Rocky Ridge town, Levan town, and Eureka city; 1,432 residents live outside any incorporated place.

Is Juab County part of a metropolitan area?

Yes. It is an outlying county of the Provo-Orem-Lehi, UT Metropolitan Statistical Area, which has 2 county equivalents and 773,426 residents.

How many ZIP codes are in Juab County?

6 ZIP Code Tabulation Areas have land in Juab County, and 4 of them have most of their land inside the county. Census ZIP Code Tabulation Areas approximate USPS ZIP Code areas.

How does Juab County compare with U.S. states?

It has more land than 2 of the 50 states, including Delaware (1,948.6 square miles of land).

How many acres of land are in Juab County?

The land measurement converts to approximately 2,170,760 acres. Including water, total area is approximately 2,179,723 acres. One square mile equals 640 acres.

Why might another source show a different area?

Check whether it reports land or total area, its Census vintage, and its rounding. Our guide explains how to reconcile county area figures.

Can this establish a property boundary?

No. Statistical measurements and generalized maps do not establish property lines. Consult the relevant local surveying or land-records authority.

Cite this county

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