12th most populous of 14
With 70,871 residents in 2024, Franklin County ranks 12th by population among Massachusetts's 14 counties and is home to 1.0% of the state's residents.

Franklin County has the smallest immigrant share in Massachusetts (5.0% foreign-born) and the weakest real GDP growth in 2024 (-6.4%).
Franklin County is home to 70,871 people (2024 estimate) on 699 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 | 70,871 | 2024 · U.S. Census Bureau |
| Population, 2010 Census | 71,372 | 2010 · U.S. Census Bureau |
| Population, 2000 | 71,471 | July 1, 2000 · Census intercensal |
| Change since 2000 | −0.8% | 2000–2024 · Census |
| International migration | +216 | 2024 · Census Vintage 2024 |
| Domestic migration | +129 | 2024 · Census Vintage 2024 |
| Birth rate | 7.0 per 1,000 | 2024 · calculated |
| Death rate | 11.6 per 1,000 | 2024 · calculated |
| Population rank in Massachusetts | 12th of 14 | 2024 · calculated |
| Per capita personal income | $70,392 | BEA, 2024 · official |
| Gross domestic product | $3.7 billion | BEA, current dollars, 2024 · official |
| Median household income | $74,907 | ACS 2020–2024 5-year · official |
| Poverty rate | 12.1% | ACS 2020–2024 5-year · official |
| Bachelor’s degree or higher | 40.6% | Age 25+, ACS 2020–2024 5-year · official |
| Foreign-born residents | 5.0% | ACS 2020–2024 5-year · official |
| Median home value | $329,000 | ACS 2020–2024 5-year · official |
| Median gross rent | $1,177/month | ACS 2020–2024 5-year · official |
| Median age | 47.2 years | ACS 2020–2024 5-year · official |
| Households | 31,570 | ACS 2020–2024 5-year · official |
| Owner-occupied homes | 70.1% | ACS 2020–2024 5-year · official |
Comparable indicators for Franklin County, Massachusetts and the United States.
| Indicator | County | Massachusetts | U.S. | Reference |
|---|---|---|---|---|
| Population change 2020–2024 | −0.2% | +1.5% | +2.6% | Census Vintage 2024 |
| Birth rate (per 1,000) | 7.0 | 9.5 | 10.6 | 2024 |
| Death rate (per 1,000) | 11.6 | 8.6 | 9.1 | 2024 |
| Net migration rate (per 1,000) | 4.9 | 8.8 | 8.2 | 2024 |
| Population density (/mi²) | 101.4 | 914.8 | 96.3 | 2024 |
| Per capita personal income | $70,392 | $93,607 | $73,204 | BEA, 2024 |
| Median household income | $74,907 | $103,960 | $80,734 | ACS 2020–2024 5-year |
| Poverty rate | 12.1% | 10.0% | 12.5% | ACS 2020–2024 5-year |
| Bachelor’s degree or higher | 40.6% | 47.3% | 35.7% | Age 25+, ACS 2020–2024 5-year |
| Foreign-born residents | 5.0% | 18.0% | 14.1% | ACS 2020–2024 5-year |
| Median home value | $329,000 | $562,100 | $332,700 | ACS 2020–2024 5-year |
| Median gross rent | $1,177/month | $1,762/month | $1,413/month | ACS 2020–2024 5-year |
| Median age | 47.2 years | 40.0 years | 38.9 years | ACS 2020–2024 5-year |
| Owner-occupied homes | 70.1% | 62.5% | 65.2% | ACS 2020–2024 5-year |
With 70,871 residents in 2024, Franklin County ranks 12th by population among Massachusetts's 14 counties and is home to 1.0% of the state's residents.
Its population went from 71,471 in 2000 to 70,871 in 2024, a change of −0.8%, compared with +12.2% for Massachusetts as a whole.
In the year to July 2024 the county recorded 493 births and 821 deaths, so deaths outnumbered births by 328.
Annual Census estimates since 2000 put the county's highest population at 71,879 in 2005. The 2024 figure is 1,008 lower.
Franklin County has about 101.4 residents per square mile of land, ranking 14th of 14 counties; Massachusetts averages 914.8.
With a median household income of $74,907 (ACS 2020–2024 5-year), the county ranks 13th of 14 Massachusetts counties; the state median is $103,960.
Its economy produced $3.7 billion of GDP in 2024 (BEA), 12th largest among 14 Massachusetts counties.
Real GDP fell 6.4% in 2024, adjusted for inflation (BEA, chained 2017 dollars).