Plymouth County's estimated 2026 population is 548,995 with a growth rate of 0.4% in the past year according to the most recent United States census data. Plymouth County is the 7th largest county in Massachusetts. The 2010 population was 495,937 and has seen a growth of 10.7% since that time.
Data after 2023 is projected based on recent change
Overall: 43 years
Female: 44.5 years
Male: 41.7 years
There are 424,239 adults, (105,740 of whom are seniors) in Plymouth County.
Female: 273,288 (51.1%)
Male: 261,787 (48.9%)
The racial composition of Plymouth County includes 76.96% White, 8.02% Black or African American, 4.43% other race, and smaller percentages for Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 411,816 | 76.96% |
| Two or more races | 46,631 | 8.71% |
| Black or African American | 42,910 | 8.02% |
| Other race | 23,723 | 4.43% |
| Asian | 8,987 | 1.68% |
| Native American | 801 | 0.15% |
| Native Hawaiian or Pacific Islander | 207 | 0.04% |
Plymouth County's average per capita income is $67,303. Household income levels show a median of $114,201. The poverty rate stands at 7.1%.
Name | Median | Mean |
|---|---|---|
| Married Families | $159,906 | $203,547 |
| Families | $138,892 | $178,644 |
| Households | $114,201 | $151,136 |
| Non Families | $56,912 | $79,447 |
Average Income
Median Household Income
Poverty Rate