| |
| Age Group | Male | Female | California, 2000, Universe: 001 Total population Universe Population: 33,871,648 | ||
| Population | Pct | Population | Pct |  | |
| Total | 16,874,892 | 49.8 | 16,996,756 | 50.2 | |
| 0- 4 | 1,272,884 | 3.8 | 1,214,097 | 3.6 | |
| 5- 9 | 1,396,480 | 4.1 | 1,329,400 | 3.9 | |
| 10-14 | 1,317,135 | 3.9 | 1,253,687 | 3.7 | |
| 15-19 | 1,271,626 | 3.8 | 1,179,262 | 3.5 | |
| 20-24 | 1,245,530 | 3.7 | 1,135,758 | 3.4 | |
| 25-29 | 1,311,445 | 3.9 | 1,232,096 | 3.6 | |
| 30-34 | 1,382,355 | 4.1 | 1,303,166 | 3.8 | |
| 35-39 | 1,430,293 | 4.2 | 1,384,450 | 4.1 | |
| 40-44 | 1,342,201 | 4.0 | 1,328,397 | 3.9 | |
| 45-49 | 1,152,957 | 3.4 | 1,178,835 | 3.5 | |
| 50-54 | 980,804 | 2.9 | 1,019,039 | 3.0 | |
| 55-59 | 711,203 | 2.1 | 756,049 | 2.2 | |
| 60-64 | 546,105 | 1.6 | 600,736 | 1.8 | |
| 65-69 | 456,776 | 1.3 | 527,759 | 1.6 | |
| 70-74 | 397,927 | 1.2 | 505,361 | 1.5 | |
| 75-79 | 327,683 | 1.0 | 451,664 | 1.3 | |
| 80-84 | 197,306 | 0.6 | 305,525 | 0.9 | |
| 85+ | 134,182 | 0.4 | 291,475 | 0.9 | |