| |
| Age Group | Male | Female | Iowa, 2000, Universe: 001 Total population Universe Population: 2,926,324 | ||
| Population | Pct | Population | Pct |  | |
| Total | 1,435,515 | 49.1 | 1,490,809 | 50.9 | |
| 0- 4 | 96,723 | 3.3 | 91,690 | 3.1 | |
| 5- 9 | 103,822 | 3.5 | 98,781 | 3.4 | |
| 10-14 | 108,101 | 3.7 | 102,446 | 3.5 | |
| 15-19 | 115,776 | 4.0 | 110,644 | 3.8 | |
| 20-24 | 103,903 | 3.6 | 99,760 | 3.4 | |
| 25-29 | 90,258 | 3.1 | 87,001 | 3.0 | |
| 30-34 | 94,579 | 3.2 | 91,222 | 3.1 | |
| 35-39 | 108,817 | 3.7 | 109,080 | 3.7 | |
| 40-44 | 113,795 | 3.9 | 113,507 | 3.9 | |
| 45-49 | 107,360 | 3.7 | 105,303 | 3.6 | |
| 50-54 | 90,248 | 3.1 | 89,883 | 3.1 | |
| 55-59 | 68,307 | 2.3 | 70,745 | 2.4 | |
| 60-64 | 56,829 | 1.9 | 61,531 | 2.1 | |
| 65-69 | 49,643 | 1.7 | 57,730 | 2.0 | |
| 70-74 | 46,748 | 1.6 | 57,814 | 2.0 | |
| 75-79 | 37,868 | 1.3 | 53,637 | 1.8 | |
| 80-84 | 24,765 | 0.8 | 42,890 | 1.5 | |
| 85+ | 17,973 | 0.6 | 47,145 | 1.6 | |