2024 Demographics
Population Data for County: San Mateo
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Population
County: San Mateo
728,762
Persons
State: California 39,172,872 Persons
Percent Population Change: 2020 to 2024
County: San Mateo
-4.67%
State: California -0.92%
| Population by Race | County: San Mateo | State: California | ||
|---|---|---|---|---|
| Persons | % of Population | Persons | % of Population | |
| White | 271,304 | 37.23% | 15,278,513 | 39.00% |
| Black/African American | 14,767 | 2.03% | 2,215,038 | 5.65% |
| American Indian/Alaskan Native | 6,552 | 0.90% | 642,765 | 1.64% |
| Asian | 230,377 | 31.61% | 6,241,623 | 15.93% |
| Native Hawaiian/Pacific Islander | 8,548 | 1.17% | 157,245 | 0.40% |
| Some Other Race | 104,081 | 14.28% | 8,661,955 | 22.11% |
| 2+ Races | 93,133 | 12.78% | 5,975,733 | 15.25% |
| Population by Ethnicity | County: San Mateo | State: California | ||
|---|---|---|---|---|
| Persons | % of Population | Persons | % of Population | |
| Hispanic/Latino | 184,762 | 25.35% | 16,180,144 | 41.30% |
| Non-Hispanic/Latino | 544,000 | 74.65% | 22,992,728 | 58.70% |
| Population by Age Group | County: San Mateo | State: California | ||
|---|---|---|---|---|
| Persons | % of Population | Persons | % of Population | |
| 0-4 | 36,532 | 5.01% | 2,077,354 | 5.30% |
| 5-9 | 38,716 | 5.31% | 2,181,469 | 5.57% |
| 10-14 | 41,120 | 5.64% | 2,421,275 | 6.18% |
| 15-17 | 25,313 | 3.47% | 1,535,768 | 3.92% |
| 18-20 | 25,551 | 3.51% | 1,681,239 | 4.29% |
| 21-24 | 32,547 | 4.47% | 2,109,414 | 5.38% |
| 25-34 | 95,246 | 13.07% | 5,533,827 | 14.13% |
| 35-44 | 110,178 | 15.12% | 5,437,084 | 13.88% |
| 45-54 | 98,846 | 13.56% | 4,864,367 | 12.42% |
| 55-64 | 94,166 | 12.92% | 4,776,532 | 12.19% |
| 65-74 | 73,856 | 10.13% | 3,834,304 | 9.79% |
| 75-84 | 40,566 | 5.57% | 1,995,084 | 5.09% |
| 85+ | 16,125 | 2.21% | 725,155 | 1.85% |
| Population by Age | County: San Mateo | State: California | ||
|---|---|---|---|---|
| Persons | % of Population | Persons | % of Population | |
| Under 18 | 141,681 | 19.44% | 8,215,866 | 20.97% |
| 18+ | 587,081 | 80.56% | 30,957,006 | 79.03% |
| 25+ | 528,983 | 72.59% | 27,166,353 | 69.35% |
| 65+ | 130,547 | 17.91% | 6,554,543 | 16.73% |
| 85+ | 16,125 | 2.21% | 725,155 | 1.85% |
Median Age
County: San Mateo
41.3
Years
State: California 38.8 Years
| Population Age 5+ by Language Spoken at Home | County: San Mateo | State: California | ||
|---|---|---|---|---|
| Persons | % of Population Age 5+ | Persons | % of Population Age 5+ | |
| Speak Only English | 386,895 | 55.89% | 20,970,802 | 56.53% |
| Speak Spanish | 115,320 | 16.66% | 10,482,889 | 28.26% |
| Speak Asian/Pac Islander Lang | 135,163 | 19.53% | 3,483,620 | 9.39% |
| Speak Indo-European Lang | 45,998 | 6.64% | 1,736,175 | 4.68% |
| Speak Other Lang | 8,854 | 1.28% | 422,032 | 1.14% |
| Population Age 15+ by Marital Status | County: San Mateo | State: California | ||
|---|---|---|---|---|
| Persons | % of Population Age 15+ | Persons | % of Population Age 15+ | |
| Never Married | 204,725 | 33.43% | 12,311,221 | 37.89% |
| Married, Spouse present | 296,583 | 48.43% | 13,885,389 | 42.73% |
| Married, Spouse absent | 34,520 | 5.64% | 1,823,148 | 5.61% |
| Divorced | 46,894 | 7.66% | 2,924,255 | 9.00% |
| Widowed | 29,672 | 4.85% | 1,548,761 | 4.77% |
Demographics information provided by Claritas, updated April 2024, under these terms of use.