Plymouth County, Massachusetts Demographics 2026
Plymouth County, Massachusetts has a population of 535,075, the 7th most populous county in Massachusetts. The median household income is $114,201 and the median home value is $556,000. The poverty rate is 7.1%.
Data vintage: U.S. Census Bureau ACS 2020–2024 5-Year Estimates · refreshed July 2026 · Methodology & source notes
Plymouth County Quick Facts
How Plymouth County Changed
Change from the 2019–2023 ACS period to 2020–2024. These are rolling five-year estimates, not year-over-year measurements.
| Metric | 2019–2023 | 2020–2024 | Change |
|---|---|---|---|
| Population | 531,889 | 535,075 | +0.6% |
| Median household income | $109,698 | $114,201 | +4.1% |
| Median home value | $513,000 | $556,000 | +8.4% |
Median Household Income
Median Home Value
Economy & Housing
Household Income Distribution
Detailed income brackets
Employment
Housing Overview
People & Demographics
Age Distribution
Race & Ethnicity
Diversity Index
Moderate diversity with one or two groups making up the majority.
State average: 53 | National average: 61
Education
Educational Attainment (Adults 25+)
Cities & Places in Plymouth County
| City | Population | Median Income | Poverty | Home Value |
|---|---|---|---|---|
| Brockton | 105,386 | $80,115 | 13.5% | $437,500 |
| Bridgewater Town | 28,471 | $112,651 | 4.8% | $533,100 |
| Abington | 17,053 | $125,400 | 5.2% | $539,600 |
| Hull | 10,138 | $115,485 | 5.8% | $646,000 |
| Middleborough Center | 8,155 | $97,616 | 8.8% | $424,900 |
| Plymouth | 7,918 | $81,703 | 10.0% | $446,800 |
| North Scituate | 6,492 | $140,329 | 2.9% | $824,800 |
| Kingston | 5,910 | $150,886 | 4.9% | $589,900 |
| Scituate | 5,796 | $124,549 | 3.4% | $821,600 |
| The Pinehills | 5,282 | $122,798 | 3.5% | $693,100 |
| Marshfield | 5,161 | $97,105 | 17.4% | $675,300 |
| Hingham | 5,130 | $205,769 | 7.7% | $1,255,700 |
| Ocean Bluff-Brant Rock | 4,540 | $119,310 | 5.3% | $554,000 |
| North Plymouth | 4,337 | $80,745 | 20.6% | $494,500 |
| Wareham Center | 3,635 | $91,936 | 5.1% | $425,700 |
| North Lakeville | 3,624 | $106,713 | 6.6% | $543,300 |
| North Pembroke | 3,393 | $194,309 | 8.3% | $536,000 |
| South Duxbury | 3,252 | $212,734 | 4.8% | $982,000 |
| Mattapoisett Center | 2,669 | $105,500 | 5.3% | $651,900 |
| West Wareham | 2,257 | $58,560 | 19.9% | $230,800 |
| Duxbury | 1,994 | $126,694 | 2.1% | $1,705,600 |
| Marshfield Hills | 1,978 | $216,250 | 3.5% | $851,700 |
| Hanson | 1,927 | $119,211 | 3.2% | $513,000 |
| Cedar Crest | 1,730 | $168,721 | 3.1% | $629,400 |
| White Island Shores | 1,620 | $106,667 | 2.4% | $407,900 |
| Weweantic | 1,452 | $62,481 | 0.0% | $420,800 |
| Onset | 1,380 | $137,997 | 4.8% | $408,300 |
| Marion Center | 1,335 | $150,700 | 13.5% | $708,600 |
| Green Harbor | 1,314 | $203,159 | 7.8% | $816,900 |
Explore Massachusetts Rankings
Population Overview
Plymouth County is located in Massachusetts with a total population of 535,075. It is the 7th most populous county out of 14 in Massachusetts. The county encompasses 29 Census-designated places.
Age Demographics
The median age in Plymouth County is 43.0 years. This is 8% higher than the state median of 40.0 years.
Economy, Income & Housing
The median household income in Plymouth County is $114,201. This is 10% higher than the state median of $103,960. It is also 41% higher than the national median of $80,734. The poverty rate stands at 7.1%. This is 29% lower than the state poverty rate of 10.0%. The unemployment rate is 5.1%. This is 1% lower than the state rate of 5.1%. The median home value is $556,000. Housing costs are 1% lower than the state median of $562,100. The home-value-to-income ratio is 4.9x. 77.6% of occupied housing units are owner-occupied. This homeownership rate is 24% higher than the state average of 62.5%.
Race & Ethnicity
The largest racial or ethnic group in Plymouth County is White (non-Hispanic), making up 76.1% of the population. Black or African American residents account for 7.8%. The Hispanic or Latino population (4.9%) is well below the state average of 13.3%. The Asian population (1.7%) is well below the state average of 7.2%.
Education
41.8% of residents aged 25 and older hold a bachelor's degree or higher. This is 12% lower than the state rate of 47.3%. Nationally, 35.7% of adults hold at least a bachelor's degree. The high school graduation rate (or equivalent) is 93.1%. Notably, 16.1% of adults hold a graduate or professional degree, indicating a highly educated workforce.
Data Sources & Methodology
All figures for Plymouth County come from the U.S. Census Bureau's American Community Survey (ACS) 2020–2024 5-Year Estimates, with comparisons drawn against Massachusetts and national averages from the same dataset. See our methodology page for how each metric is defined, or data.census.gov for official tables with margins of error.
Frequently Asked Questions
What is the population of Plymouth County, Massachusetts?
Plymouth County has a population of 535,075, making it the 7th most populous county in Massachusetts.
What is the median income in Plymouth County?
The median household income in Plymouth County is $114,201 with a poverty rate of 7.1%.
How many cities are in Plymouth County, Massachusetts?
Plymouth County contains 29 Census-designated places.