| |
| Age Group | Male | Female | Washington, 2000, Universe: 001 Total population Universe Population: 5,894,121 | ||
| Population | Pct | Population | Pct |  | |
| Total | 2,934,300 | 49.8 | 2,959,821 | 50.2 | |
| 0- 4 | 202,065 | 3.4 | 192,241 | 3.3 | |
| 5- 9 | 218,501 | 3.7 | 207,408 | 3.5 | |
| 10-14 | 222,937 | 3.8 | 211,899 | 3.6 | |
| 15-19 | 220,412 | 3.7 | 207,556 | 3.5 | |
| 20-24 | 200,812 | 3.4 | 189,373 | 3.2 | |
| 25-29 | 206,789 | 3.5 | 196,863 | 3.3 | |
| 30-34 | 223,414 | 3.8 | 214,064 | 3.6 | |
| 35-39 | 244,033 | 4.1 | 239,917 | 4.1 | |
| 40-44 | 246,265 | 4.2 | 244,872 | 4.2 | |
| 45-49 | 225,509 | 3.8 | 228,714 | 3.9 | |
| 50-54 | 195,058 | 3.3 | 196,691 | 3.3 | |
| 55-59 | 142,506 | 2.4 | 142,999 | 2.4 | |
| 60-64 | 104,014 | 1.8 | 107,061 | 1.8 | |
| 65-69 | 84,294 | 1.4 | 91,931 | 1.6 | |
| 70-74 | 72,628 | 1.2 | 88,313 | 1.5 | |
| 75-79 | 60,153 | 1.0 | 82,555 | 1.4 | |
| 80-84 | 38,693 | 0.7 | 59,496 | 1.0 | |
| 85+ | 26,217 | 0.4 | 57,868 | 1.0 | |