Rockland County - 2009 Population
Source: United States Census Bureau
| Total | Males | Females | ||||
|---|---|---|---|---|---|---|
| Age Group | Number | Percent | Number | Percent | Number | Percent |
| Total | 300,173 | 100.0 | 148,619 | 100.0 | 151,554 | 100.0 |
| <1 | 4,561 | 1.5 | 2,329 | 1.6 | 2,232 | 1.5 |
| 1 | 4,646 | 1.5 | 2,401 | 1.6 | 2,245 | 1.5 |
| 2 | 4,754 | 1.6 | 2,459 | 1.7 | 2,295 | 1.5 |
| 3 | 4,521 | 1.5 | 2,315 | 1.6 | 2,206 | 1.5 |
| 4 | 4,689 | 1.6 | 2,400 | 1.6 | 2,289 | 1.5 |
| 5-9 | 22,751 | 7.6 | 11,527 | 7.8 | 11,224 | 7.4 |
| 10-14 | 22,831 | 7.6 | 11,719 | 7.9 | 11,112 | 7.3 |
| 15-17 | 14,413 | 4.8 | 7,479 | 5.0 | 6,934 | 4.6 |
| 18-19 | 8,777 | 2.9 | 4,623 | 3.1 | 4,154 | 2.7 |
| 20-24 | 20,169 | 6.7 | 10,347 | 7.0 | 9,822 | 6.5 |
| 25-29 | 16,267 | 5.4 | 8,552 | 5.8 | 7,715 | 5.1 |
| 30-34 | 13,209 | 4.4 | 7,144 | 4.8 | 6,065 | 4.0 |
| 35-39 | 16,628 | 5.5 | 8,519 | 5.7 | 8,109 | 5.4 |
| 40-44 | 20,684 | 6.9 | 10,178 | 6.8 | 10,506 | 6.9 |
| 45-49 | 23,081 | 7.7 | 11,376 | 7.7 | 11,705 | 7.7 |
| 50-54 | 21,365 | 7.1 | 10,538 | 7.1 | 10,827 | 7.1 |
| 55-59 | 19,000 | 6.3 | 9,135 | 6.1 | 9,865 | 6.5 |
| 60-64 | 16,624 | 5.5 | 7,757 | 5.2 | 8,867 | 5.9 |
| 65-69 | 12,583 | 4.2 | 5,905 | 4.0 | 6,678 | 4.4 |
| 70-74 | 9,613 | 3.2 | 4,499 | 3.0 | 5,114 | 3.4 |
| 75-79 | 7,709 | 2.6 | 3,436 | 2.3 | 4,273 | 2.8 |
| 80-84 | 5,801 | 1.9 | 2,389 | 1.6 | 3,412 | 2.3 |
| 85+ | 5,497 | 1.8 | 1,592 | 1.1 | 3,905 | 2.6 |


