County Maps US

Norfolk County, Massachusetts

A county in Massachusetts, ranked 5 of 14 by population.

CountyFIPS 25021

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

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Population
739,749
+16,102 (+2.2%) since 2020
Land area
396.1
square miles. A further 10.9% of the total area is water
Population density
1,868
people per square mile, computed rather than published
County seat
Dedham
Seat of county government.
Established
1793
232 years ago
Largest city
Quincy city
Population 103,173.

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 Norfolk 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 Norfolk County, Massachusetts 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 576 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 Norfolk County ranks

Position among the 14 counties of Massachusetts, and among all 3,144 US counties and county-equivalents. Computed from the figures on this page.

MeasureValueIn MassachusettsNationally
Population739,7495th of 1495th of 3,144
Land area396.1 sq mi10th of 142,542nd of 3,144
Population density1,868 per sq mi3rd of 1476th of 3,144
Median household income$130,7393rd of 1430th of 3,143

Full data for Norfolk County

Every figure below is attributed to the Census Bureau product it came from, with the vintage of that product.
MeasureValueSource and vintage
Population739,749Vintage 2025 Population Estimates
Population in 2020723,647Vintage 2025 Population Estimates
2020 estimates base?726,021Vintage 2025 Population Estimates
Land area396.1 sq mi2025 Gazetteer Files
Water area48.2 sq mi2025 Gazetteer Files
Total area444.4 sq mi2025 Gazetteer Files
Population density?1,868 per sq miComputed: Vintage 2025 estimates divided by 2025 Gazetteer land area
Median household income$130,739American Community Survey 2020-2024 5-Year Estimates
Median home value$683,900American Community Survey 2020-2024 5-Year Estimates
Median age40.9American Community Survey 2020-2024 5-Year Estimates
Households283,368American Community Survey 2020-2024 5-Year Estimates
Housing units295,227American 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
+896
6,918 births, 6,022 deaths
Net migration
+1,208
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 Norfolk 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
Plymouth CountyMassachusetts55 mi546,829
Suffolk CountyMassachusetts33 mi791,891
Middlesex CountyMassachusetts32 mi1,669,979
Bristol CountyMassachusetts17 mi593,640
Worcester CountyMassachusetts11 mi888,502
Providence CountyRhode Island8.3 mi678,179

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

Side by side

All 14 counties of Massachusetts

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

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