County Maps US

McKinley County, New Mexico

A county in New Mexico, ranked 9 of 33 by population.

CountyFIPS 35031

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

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Population
68,119
-4,421 (-6.1%) since 2020
Land area
5,451
square miles. A further 0.1% of the total area is water
Population density
12.5
people per square mile, computed rather than published
County seat
Gallup
Seat of county government.
Established
1901
124 years ago
Largest city
Gallup city
Population 19,969.

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 McKinley 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 McKinley County, New Mexico 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 612 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 McKinley County ranks

Position among the 33 counties of New Mexico, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn New MexicoNationally
Population68,1199th of 33806th of 3,144
Land area5,451 sq mi7th of 3369th of 3,144
Population density12.5 per sq mi12th of 332,480th of 3,144
Median household income$47,66825th of 322,883rd of 3,143

Full data for McKinley County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population68,119Vintage 2025 Population Estimates
Population in 202072,540Vintage 2025 Population Estimates
2020 estimates base?72,881Vintage 2025 Population Estimates
Land area5,451 sq mi2025 Gazetteer Files
Water area4.9 sq mi2025 Gazetteer Files
Total area5,456 sq mi2025 Gazetteer Files
Population density?12.5 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$47,668American Community Survey 2020-2024 5-Year Estimates
Median home value$78,700American Community Survey 2020-2024 5-Year Estimates
Median age34.6American Community Survey 2020-2024 5-Year Estimates
Households21,353American Community Survey 2020-2024 5-Year Estimates
Housing units25,304American 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
-115
692 births, 807 deaths
Net migration
-399
More people moved out than moved in.

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

The 4 areas bordering McKinley 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
Cibola CountyNew Mexico128 mi26,807
San Juan CountyNew Mexico80 mi120,340
Apache CountyArizona72 mi64,445
Sandoval CountyNew Mexico66 mi159,565

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

All 33 counties of New Mexico

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

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