Nassau County - 2009 Population
Source: United States Census Bureau
| Total | Males | Females | ||||
|---|---|---|---|---|---|---|
| Age Group | Number | Percent | Number | Percent | Number | Percent |
| Total | 1,357,429 | 100.0 | 661,828 | 100.0 | 695,601 | 100.0 |
| <1 | 13,833 | 1.0 | 7,076 | 1.1 | 6,757 | 1.0 |
| 1 | 14,500 | 1.1 | 7,450 | 1.1 | 7,050 | 1.0 |
| 2 | 15,419 | 1.1 | 7,831 | 1.2 | 7,588 | 1.1 |
| 3 | 15,674 | 1.2 | 8,174 | 1.2 | 7,500 | 1.1 |
| 4 | 15,223 | 1.1 | 7,889 | 1.2 | 7,334 | 1.1 |
| 5-9 | 84,463 | 6.2 | 43,384 | 6.6 | 41,079 | 5.9 |
| 10-14 | 94,077 | 6.9 | 47,865 | 7.2 | 46,212 | 6.6 |
| 15-17 | 60,291 | 4.4 | 30,927 | 4.7 | 29,364 | 4.2 |
| 18-19 | 38,204 | 2.8 | 19,683 | 3.0 | 18,521 | 2.7 |
| 20-24 | 84,983 | 6.3 | 42,930 | 6.5 | 42,053 | 6.0 |
| 25-29 | 71,161 | 5.2 | 36,972 | 5.6 | 34,189 | 4.9 |
| 30-34 | 64,862 | 4.8 | 34,020 | 5.1 | 30,842 | 4.4 |
| 35-39 | 78,373 | 5.8 | 39,037 | 5.9 | 39,336 | 5.7 |
| 40-44 | 99,212 | 7.3 | 48,104 | 7.3 | 51,108 | 7.3 |
| 45-49 | 116,034 | 8.5 | 56,478 | 8.5 | 59,556 | 8.6 |
| 50-54 | 111,346 | 8.2 | 53,994 | 8.2 | 57,352 | 8.2 |
| 55-59 | 95,660 | 7.0 | 46,190 | 7.0 | 49,470 | 7.1 |
| 60-64 | 77,387 | 5.7 | 37,140 | 5.6 | 40,247 | 5.8 |
| 65-69 | 55,230 | 4.1 | 25,241 | 3.8 | 29,989 | 4.3 |
| 70-74 | 44,115 | 3.2 | 19,574 | 3.0 | 24,541 | 3.5 |
| 75-79 | 40,127 | 3.0 | 16,964 | 2.6 | 23,163 | 3.3 |
| 80-84 | 34,642 | 2.6 | 13,852 | 2.1 | 20,790 | 3.0 |
| 85+ | 32,613 | 2.4 | 11,053 | 1.7 | 21,560 | 3.1 |
