Middlesex County's estimated 2026 population is 1,676,029 with a growth rate of 0.36% in the past year according to the most recent United States census data. Middlesex County is the largest county in Massachusetts. The 2010 population was 1,507,694 and has seen a growth of 11.17% since that time.
Data after 2023 is projected based on recent change
Overall: 38.9 years
Female: 39.9 years
Male: 37.9 years
There are 1,319,500 adults, (267,007 of whom are seniors) in Middlesex County.
Female: 829,266 (50.6%)
Male: 809,099 (49.4%)
The racial composition of Middlesex County includes 66.75% White, 13.65% Asian, 4.9% Black or African American, 4.5% other race, and smaller percentages for Native American, Native Hawaiian or Pacific Islander and multiracial populations.
Race | Population | Percentage (of total) |
|---|---|---|
| White | 1,093,628 | 66.75% |
| Asian | 223,582 | 13.65% |
| Two or more races | 163,181 | 9.96% |
| Black or African American | 80,327 | 4.9% |
| Other race | 73,778 | 4.5% |
| Native American | 3,246 | 0.2% |
| Native Hawaiian or Pacific Islander | 623 | 0.04% |
Middlesex County's average per capita income is $79,003. Household income levels show a median of $130,847. The poverty rate stands at 7.74%.
Name | Median | Mean |
|---|---|---|
| Married Families | $191,930 | $243,601 |
| Families | $166,449 | $215,545 |
| Households | $130,847 | $178,070 |
| Non Families | $78,728 | $107,251 |
Average Income
Median Household Income
Poverty Rate