2024 Demographics
Age Data for County: San Mateo
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| 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% |
| Male Population by Age Group | County: San Mateo | State: California | ||
|---|---|---|---|---|
| Persons | % of Male Population | Persons | % of Male Population | |
| 0 - 4 | 18,702 | 5.20% | 1,060,768 | 5.48% |
| 5 - 9 | 19,938 | 5.54% | 1,113,015 | 5.75% |
| 10 - 14 | 21,160 | 5.88% | 1,238,303 | 6.40% |
| 15 - 17 | 13,031 | 3.62% | 786,712 | 4.07% |
| 18 - 20 | 13,141 | 3.65% | 858,889 | 4.44% |
| 21 - 24 | 16,851 | 4.68% | 1,089,771 | 5.63% |
| 25 - 34 | 49,496 | 13.76% | 2,831,281 | 14.63% |
| 35 - 44 | 55,913 | 15.54% | 2,723,398 | 14.07% |
| 45 - 54 | 48,605 | 13.51% | 2,387,124 | 12.34% |
| 55 - 64 | 45,358 | 12.61% | 2,323,779 | 12.01% |
| 65 - 74 | 34,381 | 9.55% | 1,795,630 | 9.28% |
| 75 - 84 | 17,393 | 4.83% | 872,877 | 4.51% |
| 85+ | 5,861 | 1.63% | 270,133 | 1.40% |
| Female Population by Age Group | County: San Mateo | State: California | ||
|---|---|---|---|---|
| Persons | % of Female Population | Persons | % of Female Population | |
| 0 - 4 | 17,830 | 4.83% | 1,016,586 | 5.13% |
| 5 - 9 | 18,778 | 5.09% | 1,068,454 | 5.39% |
| 10 - 14 | 19,960 | 5.41% | 1,182,972 | 5.97% |
| 15 - 17 | 12,282 | 3.33% | 749,056 | 3.78% |
| 18 - 20 | 12,410 | 3.36% | 822,350 | 4.15% |
| 21 - 24 | 15,696 | 4.25% | 1,019,643 | 5.14% |
| 25 - 34 | 45,750 | 12.40% | 2,702,546 | 13.63% |
| 35 - 44 | 54,265 | 14.71% | 2,713,686 | 13.69% |
| 45 - 54 | 50,241 | 13.62% | 2,477,243 | 12.50% |
| 55 - 64 | 48,808 | 13.23% | 2,452,753 | 12.37% |
| 65 - 74 | 39,475 | 10.70% | 2,038,674 | 10.29% |
| 75 - 84 | 23,173 | 6.28% | 1,122,207 | 5.66% |
| 85+ | 10,264 | 2.78% | 455,022 | 2.30% |
Demographics information provided by Claritas, updated April 2024, under these terms of use.