Chelmsford

County:: Middlesex County
County Seat:: No
Area (mi²):: 22.382
State:: Massachusetts

Chelmsford is located in Middlesex County, Massachusetts. Chelmsford has a 2025 population of 36,352. Chelmsford is currently growing at a rate of 0.24% annually but its population has decreased by -0.08% since the most recent census, which recorded a population of 36,382 in 2020.

The average household income in Chelmsford is $161,805 with a poverty rate of 4.26%.The median age in Chelmsford is 42.8 years: 42.1 years for males, and 43.4 years for females.

Demographics

The racial composition of Chelmsford includes 81.16% White, 9.08% Asian, and smaller percentages for other race, Black or African American, Native American and multiracial populations.

Population by Race

Race	Population	Percentage (of total)
White	29,395	81.16%
Asian	3,287	9.08%
Two or more races	1,826	5.04%
Other race	938	2.59%
Black or African American	695	1.92%
Native American	79	0.22%

Chelmsford Marital Status

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Chelmsford's average per capita income is $85,423. Household income levels show a median of $140,519. The poverty rate stands at 4.26%.

Families: A family includes the owner or renter of the home along with everyone related to them - whether through birth, marriage, or adoption. This includes relatives like spouses, children, parents, siblings, grandparents, and any other family members.

Households: A household includes all the people who occupy a housing unit (such as a house or apartment) as their usual place of residence.

Non Families: A nonfamily household is either someone living alone or when the owner/renter lives with people they aren't related to, like roommates.

Name	Median	Mean
Married Families	$177,155	-
Families	$162,740	$187,440
Households	$140,519	$161,805
Non Families	$64,222	$85,198

$85,423

Average Income

$140,519

Median Household Income

4.26%

Poverty Rate