5th most populous of 14
With 740,754 residents in 2024, Norfolk County ranks 5th by population among Massachusetts's 14 counties and is home to 10.4% of the state's residents.

Norfolk County has the 2nd highest share of college graduates in Massachusetts (58.8% of adults) and the 3rd highest median household income ($130,739).
Norfolk County is home to 740,754 people (2024 estimate) on 396 square miles of land. This page brings together official U.S. Census Bureau population estimates since 2000, the components of change—births, deaths and migration—American Community Survey indicators on income, housing, poverty and education, BEA economic accounts and BLS unemployment.
Pick an indicator to see its long-run evolution.
U.S. Census Bureau: intercensal estimates 2000–2009, Vintage 2020 (2010–2019) and Vintage 2024 (2020–2024), July 1.
| Indicator | Value | Year and source |
|---|---|---|
| Population estimate | 740,754 | 2024 · U.S. Census Bureau |
| Population, 2010 Census | 670,850 | 2010 · U.S. Census Bureau |
| Population, 2000 | 650,865 | July 1, 2000 · Census intercensal |
| Change since 2000 | +13.8% | 2000–2024 · Census |
| International migration | +8,722 | 2024 · Census Vintage 2024 |
| Domestic migration | −1,452 | 2024 · Census Vintage 2024 |
| Birth rate | 9.6 per 1,000 | 2024 · calculated |
| Death rate | 8.1 per 1,000 | 2024 · calculated |
| Population rank in Massachusetts | 5th of 14 | 2024 · calculated |
| Per capita personal income | $119,680 | BEA, 2024 · official |
| Gross domestic product | $75.1 billion | BEA, current dollars, 2024 · official |
| Median household income | $130,739 | ACS 2020–2024 5-year · official |
| Poverty rate | 6.7% | ACS 2020–2024 5-year · official |
| Bachelor’s degree or higher | 58.8% | Age 25+, ACS 2020–2024 5-year · official |
| Foreign-born residents | 19.3% | ACS 2020–2024 5-year · official |
| Median home value | $683,900 | ACS 2020–2024 5-year · official |
| Median gross rent | $2,149/month | ACS 2020–2024 5-year · official |
| Median age | 40.9 years | ACS 2020–2024 5-year · official |
| Households | 283,368 | ACS 2020–2024 5-year · official |
| Owner-occupied homes | 68.7% | ACS 2020–2024 5-year · official |
Comparable indicators for Norfolk County, Massachusetts and the United States.
| Indicator | County | Massachusetts | U.S. | Reference |
|---|---|---|---|---|
| Population change 2020–2024 | +2.0% | +1.5% | +2.6% | Census Vintage 2024 |
| Birth rate (per 1,000) | 9.6 | 9.5 | 10.6 | 2024 |
| Death rate (per 1,000) | 8.1 | 8.6 | 9.1 | 2024 |
| Net migration rate (per 1,000) | 9.8 | 8.8 | 8.2 | 2024 |
| Population density (/mi²) | 1870.1 | 914.8 | 96.3 | 2024 |
| Per capita personal income | $119,680 | $93,607 | $73,204 | BEA, 2024 |
| Median household income | $130,739 | $103,960 | $80,734 | ACS 2020–2024 5-year |
| Poverty rate | 6.7% | 10.0% | 12.5% | ACS 2020–2024 5-year |
| Bachelor’s degree or higher | 58.8% | 47.3% | 35.7% | Age 25+, ACS 2020–2024 5-year |
| Foreign-born residents | 19.3% | 18.0% | 14.1% | ACS 2020–2024 5-year |
| Median home value | $683,900 | $562,100 | $332,700 | ACS 2020–2024 5-year |
| Median gross rent | $2,149/month | $1,762/month | $1,413/month | ACS 2020–2024 5-year |
| Median age | 40.9 years | 40.0 years | 38.9 years | ACS 2020–2024 5-year |
| Owner-occupied homes | 68.7% | 62.5% | 65.2% | ACS 2020–2024 5-year |
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With 740,754 residents in 2024, Norfolk County ranks 5th by population among Massachusetts's 14 counties and is home to 10.4% of the state's residents.
Its population went from 650,865 in 2000 to 740,754 in 2024, a change of +13.8%, compared with +12.2% for Massachusetts as a whole.
In the year to July 2024 the county recorded 7,102 births and 6,016 deaths, so births outnumbered deaths by 1,086.
Annual Census estimates since 2000 put the county's highest population in 2024, at 740,754.
Norfolk County has about 1870.1 residents per square mile of land, ranking 3rd of 14 counties; Massachusetts averages 914.8.
With a median household income of $130,739 (ACS 2020–2024 5-year), the county ranks 3rd of 14 Massachusetts counties; the state median is $103,960.
Its economy produced $75.1 billion of GDP in 2024 (BEA), 3rd largest among 14 Massachusetts counties.
Real GDP grew 2.0% in 2024, adjusted for inflation (BEA, chained 2017 dollars).