Box Elder County, Utah

A county in Utah, ranked 9 of 29 by population.

CountyFIPS 49003

Within Utah

Box Elder County, highlighted, with the areas around it. Boundaries generalised from the 2025 Census cartographic boundary file; neighbour fills carry no data.

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Population: 65,320; +7,376 (+12.7%) since 2020
Land area: 5,781; square miles. A further 14.1% of the total area is water
Population density: 11.3; people per square mile, computed rather than published
County seat: Brigham City; Seat of county government.
Established: 1856; 169 years ago
Largest city: Brigham City city; Population 20,633.

Satellite view

Aerial imagery of Box Elder County with its boundary drawn on top. A map shows you the shape; this shows you what is inside it, and which side of the line a place falls on.

Aerial view of Box Elder County, Utah from the USGS National Map, with its boundary outlined — Imagery: USGS National Map, USGS Imagery Only, public domain, requested from USGS by your browser when you reach this point on the page, at 800 by 526 pixels. The boundary is the 2025 Census cartographic boundary file, reprojected to Web Mercator to match the imagery. You can also open the USGS National Map viewer.

Where Box Elder County ranks

Position among the 29 counties of Utah, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

Measure	Value	In Utah	Nationally
Population	65,320	9th of 29	840th of 3,144
Land area	5,781 sq mi	4th of 29	64th of 3,144
Population density	11.3 per sq mi	15th of 29	2,515th of 3,144
Median household income	$84,550	10th of 29	435th of 3,143

Full data for Box Elder County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
Measure	Value	Source and vintage
Population	65,320	Vintage 2025 Population Estimates
Population in 2020	57,944	Vintage 2025 Population Estimates
2020 estimates base?	57,668	Vintage 2025 Population Estimates
Land area	5,781 sq mi	2025 Gazetteer Files
Water area	947.9 sq mi	2025 Gazetteer Files
Total area	6,729 sq mi	2025 Gazetteer Files
Population density?	11.3 per sq mi	Computed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income	$84,550	American Community Survey 2020-2024 5-Year Estimates
Median home value	$403,600	American Community Survey 2020-2024 5-Year Estimates
Median age	33.3	American Community Survey 2020-2024 5-Year Estimates
Households	19,557	American Community Survey 2020-2024 5-Year Estimates
Housing units	20,760	American Community Survey 2020-2024 5-Year Estimates

Sources: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026; US Census Bureau, Gazetteer Files, 2025 Gazetteer Files, released 10 September 2025; US Census Bureau, American Community Survey, American Community Survey 2020-2024 5-Year Estimates, released 29 January 2026. Population density is computed here, not published: it divides the Vintage 2025 population estimate by the 2025 Gazetteer land area, which are two different Census products. Retrieved 30 August 2026.

How the population changed

The Census Bureau publishes the components behind an estimate, not just the total. For the year to July 2025:

Births minus deaths: +381; 849 births, 468 deaths
Net migration: +962; More people moved in than moved out.

Source: US Census Bureau, Population Estimates Program, Vintage 2025 Population Estimates, released 26 March 2026. Retrieved 30 August 2026.

The 7 areas bordering Box Elder County

Ordered by the length of the border actually shared, which the Census Bureau publishes in its county adjacency file and which no other county reference presents.

Bordering area	State	Shared border	Population
Tooele County	Utah	82 mi	87,461
Elko County	Nevada	69 mi	54,815
Cache County	Utah	58 mi	145,000
Cassia County	Idaho	54 mi	26,397
Weber County	Utah	49 mi	278,174
Oneida County	Idaho	43 mi	5,085
Davis County	Utah	a single point	381,227

Source: US Census Bureau, County Adjacency File, 2025 County Adjacency File, released 15 September 2025. Retrieved 30 August 2026.

All 29 counties of Utah

Open the interactive Utah county map, or jump straight to any of them.

Data on this page last rebuilt 30 August 2026. How these figures are produced.