Population by Age Group
| Age Group | Under 18 | 18-64 | 65 and over | |||
|---|---|---|---|---|---|---|
| Total | Percentage | Total | Percentage | Total | Percentage | |
| San Mateo | 20,254 | 21% | 62,973 | 65% | 13,980 | 14% |
* For the table above, the data is collected from the U.S. Census Bureau Decennial Data 2010, Summary File 1 (SF1), P12 Sex by Age.