Plymouth County's estimated 2026 population is 550,656 with a growth rate of 0.78% 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 11.03% since that time.
Data after 2023 is projected based on recent change
The racial composition of Plymouth County includes 77.99% White, 8.76% Black or African American, 3.88% other race, and smaller percentages for Asian, Native American, Native Hawaiian or Pacific Islander and multiracial populations.
White (77.99%)
Black or African American (8.76%)
Two or more races (7.51%)
Other race (3.88%)
Asian (1.66%)
Native American (0.16%)
Native Hawaiian or Pacific Islander (0.04%)
Race | Population | Percentage (of total) |
|---|---|---|
| White | 414,831 | 77.99% |
| Black or African American | 46,620 | 8.76% |
| Two or more races | 39,930 | 7.51% |
| Other race | 20,636 | 3.88% |
| Asian | 8,826 | 1.66% |
| Native American | 846 | 0.16% |
| Native Hawaiian or Pacific Islander | 200 | 0.04% |
Married
Widowed
Divorced
Separated
Never Married
Plymouth County's average per capita income is $64,513. Household income levels show a median of $109,698. The poverty rate stands at 7.09%.
Name | Median | Mean |
|---|---|---|
| Married Families | $153,380 | $196,372 |
| Families | $133,494 | $173,415 |
| Households | $109,698 | $147,024 |
| Non Families | $54,028 | $77,907 |
Average Income
Median Household Income
Poverty Rate