Demographics · MA
Cambridge, MA demographics: 118,796 residents, with a median age of 30.4 years, from the U.S. Census Bureau's American Community Survey 2020–2024 (5-year estimates).
118,796people live in Cambridge, at a median age of 30.4 years (American Community Survey 2020–2024, a 5-year average)
Median age 30.4 years — younger than the U.S. median of 38.9.
ACS 2020–2024 5-year · ACS 5-Year Estimates 2020-2024 (released 2026-01-29)
In Cambridge, the largest race group is White (55.7%); 8.8% of residents are Hispanic or Latino (of any race); 29.7% were born outside the United States.
ACS 2020–2024 · B01001 / B01002
The median age in Cambridge is 30.4 years (±0.4), younger than the U.S. median of 38.9 years. The population is 50.4% male and 49.6% female. The largest age band is 25 to 34 at 26.7%.
| Age band | People | Share | ± margin |
|---|---|---|---|
| Under 5 | 4,963 | 4.2% | ±546 |
| 5 to 17 | 9,727 | 8.2% | ±757 |
| 18 to 24 | 24,831 | 20.9% | ±1,228 |
| 25 to 34 | 31,707 | 26.7% | ±1,272 |
| 35 to 44 | 15,556 | 13.1% | ±877 |
| 45 to 54 | 9,300 | 7.8% | ±651 |
| 55 to 64 | 8,272 | 7.0% | ±637 |
| 65 to 74 | 8,636 | 7.3% | ±650 |
| 75 and over | 5,804 | 4.9% | ±440 |
Median age by sex: 30.0 (male) · 30.9 (female).
Shares may not sum to 100% due to rounding. Source: U.S. Census Bureau, ACS 5-Year 2020–2024 (B01001 sex by age, B01002 median age) · place-grain · margins of error at the 90% confidence level · methodology →
ACS 2020–2024 · B02001 / B03003
The largest race group in Cambridge is White at 55.7% of the population. Separately, 8.8% of residents are Hispanic or Latino of any race.Race and Hispanic origin are two different questions on the census form, so their shares are reported separately and are not additive.
| Race (alone, or two or more) | People | Share | ± margin |
|---|---|---|---|
| White alone | 66,193 | 55.7% | ±2,008 |
| Black or African American alone | 12,447 | 10.5% | ±1,155 |
| American Indian & Alaska Native alone | 198 | 0.2% | ±110 · low precision |
| Asian alone | 24,211 | 20.4% | ±1,412 |
| Native Hawaiian & Pacific Islander alone | 70 | 0.1% | ±59 · low precision |
| Some other race alone | 3,088 | 2.6% | ±564 |
| Two or more races | 12,589 | 10.6% | ±962 |
| Hispanic or Latino (of any race) | 10,505 | 8.8% | ±1,086 |
Race shares may not sum to 100% due to rounding; race and Hispanic origin are separate questions and are not additive. Source: U.S. Census Bureau, ACS 5-Year 2020–2024 (B02001 race, B03003 Hispanic or Latino origin) · place-grain · margins of error at the 90% confidence level · methodology →
ACS 2020–2024 · B11001 / B25010
Cambridge has 49,444 households. 40.0% are family households and 37.5% are people living alone. The average household holds 2.05 people.
Total households
49,444
ACS 2020–2024 5-yr · B11001
Avg household size
2.05
ACS 2020–2024 5-yr · B25010 · ±0.03
Family households
40.0%
Share of all households · B11001
Living alone
37.5%
Share of all households · B11001
| Household type | Households | ± margin |
|---|---|---|
| Total households | 49,444 | ±765 |
| Family households | 19,757 | ±649 |
| Nonfamily households | 29,687 | ±1,064 |
| Householder living alone | 18,536 | ±933 |
Source: U.S. Census Bureau, ACS 5-Year 2020–2024 (B11001 household type, B25010 average household size) · place-grain · methodology →
ACS 2020–2024 · B05002 / C16001
29.7% of Cambridge residents were born outside the United States. 64.8% of residents age 5 and over speak only English at home. The most-spoken non-English language at home is Other Indo-European (7.6%).
| Measure | Value | Source / grain |
|---|---|---|
| Foreign-born share | 29.7% | 35,245 people · B05002 |
| Speak only English at home (age 5+) | 64.8% | C16001 |
| Top non-English language at home | 7.6% | Other Indo-European · 8,641 speakers · C16001 |
Source: U.S. Census Bureau, ACS 5-Year 2020–2024 (B05002 place of birth, C16001 language spoken at home) · place-grain · methodology →
ACS 2020–2024 · B15003
80.8% of adults age 25 and over in Cambridge hold a bachelor's degree or higher (the U.S. share is about 35%).
| Measure | Value | Source / grain |
|---|---|---|
| Bachelor's degree or higher (age 25+) | 80.8% | B15003 lines 22–25 over line 1 · place-grain |
Source: U.S. Census Bureau, ACS 5-Year 2020–2024 (B15003 educational attainment, population 25+) · place-grain · methodology →
Sources · provenance
The GEOID for Cambridge is 2511000. Every figure on this page is a place-grain American Community Survey 5-Year 2020–2024 estimate (ACS 5-Year Estimates 2020-2024 (released 2026-01-29)) shown with its margin of error. Full per-dataset detail: /sources/.