Population by Age Group
* For the table above, the data is collected from the U.S. Census Bureau Decennial Data 2000, Summary File 1 (SF1), P012 Sex by Age.
| Age Group | Under 18 | 18-64 | 65 and over | |||
|---|---|---|---|---|---|---|
| Total | Percentage | Total | Percentage | Total | Percentage | |
| San Mateo | 18,834 | 20% | 59,716 | 65% | 13,932 | 15% |