County Maps US

Pima County, Arizona

A county in Arizona, ranked 2 of 15 by population.

CountyFIPS 04019

Within Arizona
Pima County, highlighted, with the areas around it. Boundaries generalised from the 2025 Census cartographic boundary file; neighbour fills carry no data. The dot marks Tucson, the county seat, located via the 2025 Census Gazetteer.

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Population
1,074,685
+29,440 (+2.8%) since 2020
Land area
9,189
square miles. A further 0.0% of the total area is water
Population density
117
people per square mile, computed rather than published
County seat
Tucson
Seat of county government.
Established
1864
161 years ago
Largest city
Tucson city
Population 548,371.

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; Wikidata (CC0), Wikidata. Retrieved 30 August 2026.

Satellite view

Aerial imagery of Pima 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 Pima County, Arizona 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 403 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 Pima County ranks

Position among the 15 counties of Arizona, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn ArizonaNationally
Population1,074,6852nd of 1544th of 3,144
Land area9,189 sq mi6th of 1529th of 3,144
Population density117 per sq mi2nd of 15810th of 3,144
Median household income$70,3155th of 151,178th of 3,143

Full data for Pima County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population1,074,685Vintage 2025 Population Estimates
Population in 20201,045,245Vintage 2025 Population Estimates
2020 estimates base?1,043,431Vintage 2025 Population Estimates
Land area9,189 sq mi2025 Gazetteer Files
Water area2.0 sq mi2025 Gazetteer Files
Total area9,191 sq mi2025 Gazetteer Files
Population density?117 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$70,315American Community Survey 2020-2024 5-Year Estimates
Median home value$319,700American Community Survey 2020-2024 5-Year Estimates
Median age39.8American Community Survey 2020-2024 5-Year Estimates
Households437,827American Community Survey 2020-2024 5-Year Estimates
Housing units479,939American 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
-1,721
9,984 births, 11,705 deaths
Net migration
+2,889
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 6 areas bordering Pima 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 areaStateShared borderPopulation
Pinal CountyArizona104 mi539,380
Santa Cruz CountyArizona75 mi50,020
Maricopa CountyArizona66 mi4,689,558
Cochise CountyArizona48 mi126,332
Yuma CountyArizona32 mi224,449
Graham CountyArizona6.0 mi40,157

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

Side by side

All 15 counties of Arizona

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

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