| |
| Age Group | Male | Female | Idaho, 2000, Universe: 001 Total population Universe Population: 1,293,953 | ||
| Population | Pct | Population | Pct |  | |
| Total | 648,660 | 50.1 | 645,293 | 49.9 | |
| 0- 4 | 50,047 | 3.9 | 47,596 | 3.7 | |
| 5- 9 | 51,860 | 4.0 | 48,896 | 3.8 | |
| 10-14 | 53,697 | 4.1 | 50,911 | 3.9 | |
| 15-19 | 56,131 | 4.3 | 54,727 | 4.2 | |
| 20-24 | 48,934 | 3.8 | 45,060 | 3.5 | |
| 25-29 | 44,117 | 3.4 | 41,011 | 3.2 | |
| 30-34 | 43,111 | 3.3 | 41,194 | 3.2 | |
| 35-39 | 47,940 | 3.7 | 46,973 | 3.6 | |
| 40-44 | 49,149 | 3.8 | 48,906 | 3.8 | |
| 45-49 | 46,290 | 3.6 | 45,882 | 3.5 | |
| 50-54 | 39,499 | 3.1 | 38,577 | 3.0 | |
| 55-59 | 29,949 | 2.3 | 30,075 | 2.3 | |
| 60-64 | 23,775 | 1.8 | 23,730 | 1.8 | |
| 65-69 | 19,462 | 1.5 | 20,707 | 1.6 | |
| 70-74 | 16,768 | 1.3 | 19,033 | 1.5 | |
| 75-79 | 13,280 | 1.0 | 17,163 | 1.3 | |
| 80-84 | 8,670 | 0.7 | 12,776 | 1.0 | |
| 85+ | 5,981 | 0.5 | 12,076 | 0.9 | |