Plymouth County, Massachusetts Demographics
Population trends, housing costs, income, commuting, and health, all on one page.
Plymouth County, MA Population Density Map and Area Scores
Area Score
Health, income and education, each graded from F to A+. Explore interactive maps for deeper analysis.
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A
Health Above average
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B
Income Around averageAmong the top 5 wealthiest counties in Massachusetts
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B
Education Around averageAmong the 5 least educated counties in Massachusetts
Source: Map AI Methodology
Population: density and quick facts
| Metric | Plymouth County | Massachusetts Avg | U.S. Average |
|---|---|---|---|
| Population | 534,586 | 7,031,620 | 337,468,954 |
| Population density (per sq mi) | 489.1 | 666.0 | 86.4 |
| Population growth (%/yr) | 0.67% | 0.53% | 0.59% |
| Median age | 41.0 | 39.0 | 37.3 |
| Households | 203,097 | 2,777,931 | 130,235,071 |
Population in Plymouth County grew by 8.5% from 2009 to 2024, reaching 534,586 in 2024.
Population Growth 2009–2024
Race & Ethnicity
Age & Sex
The largest generation in Plymouth County is Gen X, aged 45–60, at 22.9% of residents. That is 1.8 points above Massachusetts as a whole.
- Gen Z 13–28 103,964 19.4% -2.1 pts
- Millennials 29–44 104,582 19.6% -2.4 pts
- Gen X 45–60 122,431 22.9% +1.8 pts
- Boomers 61–79 102,222 19.1% +1.8 pts
Residents by birth cohort, from the 2025 age distribution. The right-hand figure is how far each cohort's share sits above or below Massachusetts, in percentage points. Children younger than Gen Z and the generations before the Boomers are counted in the population but not shown here, so these shares do not add up to 100%.
Male and female share
Women are 51.1% of the people living in Plymouth County and men 48.9%.
- Women 51.1% Massachusetts 51.2%
- Men 48.9% Massachusetts 48.8%
How many residents match a customer profile?
Residents matching this profile
100% of everyone living in Plymouth County
Pick an age range and a women/men split and the figure above answers with how many residents that profile reaches.
Economy
Plymouth County has a the economy index of B, which means it is quite prosperous.
| Metric | Plymouth County | Massachusetts Avg | U.S. Average |
|---|---|---|---|
| Median household income | $114,939 | $104,336 | $80,455 |
| Income growth (%/yr) | 4.91% | 4.91% | 4.80% |
| Unemployment rate | 5.1% | 5.1% | 5.2% |
The median household income in Plymouth County is about 10% higher than in Massachusetts.
Housing
| Metric | Plymouth County | Massachusetts Avg | U.S. Average |
|---|---|---|---|
| Median home price | $463,963 | $494,523 | $248,835 |
| Median rent | $1,747 | $1,761 | $1,407 |
| Homeownership rate | 77.6% | 62.5% | 65.2% |
The median home price in Plymouth County is about 22.1 years' worth of rent — buying at the median price costs roughly as much as paying the median rent of $1,747 per month for that long.
Commute Time & Mobility
Commuters in Plymouth County spend about 56 minutes on the road round trip each working day. Over a typical 250-day work year, that adds up to roughly 234 hours, about 9.7 full days, spent commuting.
| Metric | Plymouth County | Massachusetts Avg | U.S. Average |
|---|---|---|---|
| One-way commute (min) | 28.0 | 25.6 | 22.4 |
| Round-trip commute (min) | 56.0 | 51.1 | 44.8 |
| Yearly time spent (hours) | 234 | 213 | 187 |
| Estimated yearly cost | $7,239 | $6,603 | $5,790 |
| Work from home | 16.2% | 18.6% | 15.0% |
| Highway traffic (vehicles/day) | 12,242 | 14,741 | 8,813 |
| Local road traffic (vehicles/day) | 2,237 | 2,164 | 1,355 |
Fastest commutes among counties in
Massachusetts:
Nantucket County (12.8 min), Dukes County (15.4 min), Berkshire County (16.8 min).
Slowest:
Norfolk County (31.0 min), Suffolk County (30.4 min), Middlesex County (28.4 min).
The average commute time in Plymouth County is 28 minutes, longer than the 26 minutes in Massachusetts.
Estimated yearly cost applies a single national wage rule of thumb (U.S. Bureau of Labor Statistics average hourly earnings), not a measurement of wages in this area. Traffic volume figures come from proprietary Ticon and TrafficZoom data.
Education & Households
Plymouth County has a education index of B, which means it is quite educated.
| Metric | Plymouth County | Massachusetts Avg | U.S. Average |
|---|---|---|---|
| Bachelor's degree or higher | 38.0% | 42.7% | 31.6% |
| Average household size | 2.58 | 2.44 | 2.53 |
Highest education index among counties in
Massachusetts:
Middlesex County (0.5), Norfolk County (0.4), Nantucket County (0.4).
Lowest:
Hampden County (0.3), Bristol County (0.3), Berkshire County (0.3).
Health
Plymouth County has a health index of A, which means it is very healthy.
| Metric | Plymouth County | Massachusetts Avg | U.S. Average |
|---|---|---|---|
| Life expectancy (years) | 80.0 | 80.5 | 78.3 |
| Self-rated poor health | 11.4% | 11.8% | 16.3% |
| Smokers | 14.9% | 13.9% | 19.0% |
Highest health index among counties in
Massachusetts:
Middlesex County (0.8), Hampshire County (0.8), Norfolk County (0.8).
Lowest:
Hampden County (0.8), Bristol County (0.8), Worcester County (0.8).
Plymouth County, MA Compared With Nearby Counties
Plymouth County, MA is typical in size for this group, 534,586 residents against a local median of 582,104, so the measures below are close to a like for like comparison. Where Plymouth County, MA breaks from the counties next to it is median home price, sitting 22% below the local median of $597,016 at $463,963.
Commute tells the same story from another angle: 28.0 min against a local median of 23.2 min, 21% above it. The picture is mixed rather than uniform: median household income runs ahead of the neighbourhood while commute runs behind it, so Plymouth County, MA is trading one against the other rather than simply out-performing what surrounds it. The counties themselves spread $1,114,771 on median home price, so Plymouth County, MA sits at one end of an already wide local range rather than apart from it. Plymouth County, MA has the 4th highest median home price of the 6 areas compared here.
| Area | Population | Median household income | Median home price | Commute |
|---|---|---|---|---|
| Plymouth County, MA | 534,586 | $114,939 #3/6 | $463,963 #4/6 | 28.0 min #4/6 |
| Bristol County, MA | 582,104 | $85,695 | $367,046 | 23.2 min |
| Suffolk County, MA | 779,263 | $95,719 | $753,442 | 30.4 min |
| Norfolk County, MA | 729,949 | $131,149 | $597,016 | 31.0 min |
| Barnstable County, MA | 231,272 | $95,861 | $446,620 | 18.8 min |
| Dukes County, MA | 20,933 | $126,345 | $1,481,817 | 15.4 min |
Frequently Asked Questions
Common questions about Plymouth County, Massachusetts.
What is the population of Plymouth County, Massachusetts?
About 534,586 people live in Plymouth County, Massachusetts, in 203,097 households of 2.6 people on average. The median age is 41.0, so residents are older than the U.S. median of 37.3 by about 4 years.
Is Plymouth County, Massachusetts urban or rural?
Averaged over its land area, Plymouth County, Massachusetts has 489 people per square mile, a density typical of a mix of suburbs, small towns and farmland. That is about 5.7 times the U.S. average of 86.
How affordable is housing in Plymouth County, Massachusetts?
The median home costs 4.0 times the median household income ($463,963 against $114,939), compared with 3.1 times nationally. A ratio of about 3 is traditionally considered affordable. Median rent of $1,747 a month takes about 18% of the median household's income, below the 30% level at which HUD considers renters cost-burdened.
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