Waltham Flag

Waltham

County Seat:
No
Area (mi²):
12.745
State:
Massachusetts

Waltham is a city located in Middlesex County, Massachusetts. Waltham has a 2025 population of 66,251 . Waltham is currently growing at a rate of 0.61% annually and its population has increased by 3.13% since the most recent census, which recorded a population of 64,238 in 2020.

The average household income in Waltham is $143,889 with a poverty rate of 8.62%. The median age in Waltham is 35.1 years: 34.4 years for males, and 35.8 years for females. For every 100 females there are 97.1 males.

66.3K
Total Population
5,198
Density (mi²)
402 0.61%
Growth

Waltham Population

Waltham Population

Data after 2023 is projected based on recent change

Demographics

The racial composition of Waltham includes 62.2% White, 12.88% Asian, 7.48% Black or African American, 7.27% other race, and smaller percentages for Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

White (62.2%)

Asian (12.88%)

Two or more races (9.19%)

Black or African American (7.48%)

Other race (7.27%)

Native American (0.88%)

Native Hawaiian or Pacific Islander (0.11%)

Race
Population
Percentage (of total)
White40,25762.2%
Asian8,33512.88%
Two or more races5,9469.19%
Black or African American4,8427.48%
Other race4,7067.27%
Native American5680.88%
Native Hawaiian or Pacific Islander690.11%

Waltham Marital Status

OverallMalesFemales0%10%20%30%40%50%60%70%80%90%100%

Married

Widowed

Divorced

Separated

Never Married

Economics and Income Statistics

Waltham's average per capita income is $71,189. Household income levels show a median of $116,560. The poverty rate stands at 8.62%.

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$167,791-
Families$139,460$173,261
Households$116,560$143,889
Non Families$85,484$107,409

$71,189

Average Income

$116,560

Median Household Income

8.62%

Poverty Rate

Nearby Cities

Sources

  1. US Census State Population Estimates - Most recent state estimates from the Census Bureau's Population Estimates Program
  2. US Census County Population Estimates - Most recent county estimates from the Census Bureau's Population Estimates Program
  3. American Community Survey (2009 - 2013)
  4. Census QuickFacts
  5. Historical Populations of States and Counties (1790 - 1990)