County Maps US

Hamilton County, Nebraska

A county in Nebraska, ranked 28 of 93 by population.

CountyFIPS 31081

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

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Population
9,678
+272 (+2.9%) since 2020
Land area
542
square miles. A further 0.5% of the total area is water
Population density
17.9
people per square mile, computed rather than published
County seat
Aurora
Seat of county government.
Established
1867
158 years ago
Largest city
Aurora city
Population 4,787.

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 Hamilton 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 Hamilton County, Nebraska 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 605 by 800 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 Hamilton County ranks

Position among the 93 counties of Nebraska, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn NebraskaNationally
Population9,67828th of 932,434th of 3,144
Land area542 sq mi71st of 931,927th of 3,144
Population density17.9 per sq mi23rd of 932,310th of 3,144
Median household income$83,9945th of 93452nd of 3,143

Full data for Hamilton County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population9,678Vintage 2025 Population Estimates
Population in 20209,406Vintage 2025 Population Estimates
2020 estimates base?9,427Vintage 2025 Population Estimates
Land area542 sq mi2025 Gazetteer Files
Water area2.7 sq mi2025 Gazetteer Files
Total area544.7 sq mi2025 Gazetteer Files
Population density?17.9 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$83,994American Community Survey 2020-2024 5-Year Estimates
Median home value$253,700American Community Survey 2020-2024 5-Year Estimates
Median age42.0American Community Survey 2020-2024 5-Year Estimates
Households3,628American Community Survey 2020-2024 5-Year Estimates
Housing units4,133American 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
+20
134 births, 114 deaths
Net migration
+26
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 Hamilton 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
Merrick CountyNebraska33 mi7,905
York CountyNebraska24 mi14,564
Clay CountyNebraska24 mi6,170
Hall CountyNebraska12 mi63,633
Polk CountyNebraska8.9 mi5,270
Adams CountyNebraska0.2 mi31,071

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

All 93 counties of Nebraska

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

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