Waltham Flag

Waltham

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

Waltham is a city located in Middlesex County, Massachusetts. Waltham has a 2026 population of 66,654. Waltham is currently growing at a rate of 0.61% annually and its population has increased by 3.76% since the most recent census, which recorded a population of 64,238 in 2020.

The median household income in Waltham is $120,216 with a poverty rate of 9.41%. The median age in Waltham is 34.4 years: 33.8 years for males, and 35.1 years for females. For every 100 females there are 100.0 males.

66.7K
Total Population
5,230
Density (mi²)
403 0.61%
Growth

Waltham Population

Waltham Population

Data after 2023 is projected based on recent change

Year ↓
Population
Growth
Annual Change
202666,6544030.61%
202566,2514020.61%
202465,8496841.05%
202365,1654460.69%
202264,7191430.22%
202164,5763380.53%
202064,238-968-1.48%
201962,460-122-0.19%
201862,582-277-0.44%
201762,859-140-0.22%
201662,999-57-0.09%
201563,056-106-0.17%
201463,1627921.27%
201362,3702870.46%
201262,0836701.09%
201161,4135010.82%
201060,9122800.46%
200059,2261,3482.33%
199057,878-322-0.55%
198058,200-3,382-5.49%
197061,5826,16911.13%
196055,4138,22617.43%
195047,1877,16717.91%
194040,0207731.97%
193039,2478,33226.95%
192030,9153,08111.07%
191027,8344,35318.54%
190023,4814,77425.52%
189018,7076,99559.73%
188011,7122,64729.2%
18709,0652,66841.71%
18606,3971,93343.3%
18504,46400%

Median Age

Overall: 34.4 years
Female: 35.1 years
Male: 33.8 years

Waltham Adults

There are 56,054 adults, (10,228 of whom are seniors) in Waltham.

Sex Ratio

Female: 32,449 (50%)
Male: 32,453 (50%)

Demographics

The racial composition of Waltham includes 60.03% White, 12.65% Asian, 8.67% Black or African American, 7.04% other race, and smaller percentages for Native American, Native Hawaiian or Pacific Islander and multiracial populations.

Population by Race

Race
Population ↓
Percentage (of total)
White38,95960.03%
Asian8,20912.65%
Two or more races6,84810.55%
Black or African American5,6308.67%
Other race4,5727.04%
Native American5870.9%
Native Hawaiian or Pacific Islander970.15%
Race
Population ↓
Percentage (of total)
Two or more races4,0696.27%
Other race4,0106.18%
White1,5762.43%
Native American4180.64%
Black or African American2240.35%
Asian200.03%
Race
Population ↓
Percentage (of total)
White37,38357.6%
Asian8,18912.62%
Black or African American5,4068.33%
Two or more races2,7794.28%
Other race5620.87%
Native American1690.26%
Native Hawaiian or Pacific Islander970.15%

Waltham Marital Status

Economics and Income Statistics

Waltham 's average per capita income is $75,552. Household income levels show a median of $120,216. The poverty rate stands at 9.41%.

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$171,903$198,527
Families$153,053$180,890
Households$120,216$145,664
Non Families$81,963$103,514

$75,552

Average Income

$120,216

Median Household Income

9.41%

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)