Plymouth County
Plymouth County is significantly wealthier than the US average, with a median household income of $114,201. Population has held roughly steady since 2000. Median home value has roughly tripled since 2000, reaching $556,000. It ranks in the top 1% of US counties for household income.
Population & growth
PEP 2025 EST:546,829 residents (Census Bureau Vintage 2025, released March 2026)
Income & economy
Housing
Race & ethnicity
Detailed origins & ancestry
+ 9 more hispanic origin groups with data
+ 2 more asian origin groups with data
+ 49 more ancestry groups with data
Education
Commute & transportation
Work & employment
People & community
Places similar to Plymouth County
Compare Plymouth County to nearby counties
How many people live in Plymouth County, Massachusetts?
Plymouth County, Massachusetts has about 535,075 residents according to the 2024 American Community Survey.
What is the median household income in Plymouth County, Massachusetts?
The typical household in Plymouth County, Massachusetts earns about $114,201 a year. Half of households make more than that, and half make less.
Is Plymouth County, Massachusetts expensive?
In Plymouth County, Massachusetts, the median home is worth about $556,000, and the typical rent is about $1,747 a month.
How educated are people in Plymouth County, Massachusetts?
About 41.8% of adults age 25 and over in Plymouth County, Massachusetts hold a bachelor's degree or higher.
What is the poverty rate in Plymouth County, Massachusetts?
About 7.1% of people in Plymouth County, Massachusetts live below the federal poverty line.
Has Plymouth County, Massachusetts grown since 1990?
Yes, Plymouth County, Massachusetts has grown since 1990. The population has added about 99,799 residents, a change of about 23 percent over that period.
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DATA: US CENSUS BUREAU ACS 5-YEAR + DECENNIAL CENSUS · UPDATED 2024