| Estimates as of July 1, 2007 | ||||||||||
| Both Sexes | ||||||||||
| Age Group | ||||||||||
| County | Total | 0-4 | 5-9 | 10-14 | 15-19 | 20-24 | 25-29 | 30-34 | 35-39 | 40-44 |
| New Jersey | 8,636,043 | 560,876 | 560,190 | 580,775 | 583,506 | 518,115 | 545,893 | 548,339 | 628,508 | 690,534 |
| Atlantic | 269,945 | 17,477 | 16,743 | 18,411 | 18,451 | 16,350 | 16,449 | 15,275 | 18,354 | 21,121 |
| Bergen | 885,664 | 50,054 | 55,167 | 58,946 | 56,253 | 47,659 | 45,968 | 52,741 | 64,650 | 74,112 |
| Burlington | 446,314 | 26,224 | 28,339 | 30,804 | 30,600 | 28,148 | 25,337 | 26,481 | 32,413 | 37,083 |
| Camden | 517,559 | 34,408 | 33,886 | 36,360 | 37,597 | 33,189 | 35,874 | 32,904 | 36,896 | 39,151 |
| Cape May | 96,700 | 4,614 | 4,769 | 5,685 | 6,366 | 5,392 | 4,318 | 3,903 | 5,046 | 6,344 |
| Cumberland | 155,402 | 11,557 | 10,018 | 10,233 | 10,828 | 10,081 | 11,554 | 11,314 | 11,562 | 11,420 |
| Essex | 769,139 | 57,141 | 53,470 | 52,399 | 52,661 | 49,396 | 55,109 | 54,123 | 57,843 | 59,625 |
| Gloucester | 286,056 | 17,145 | 18,951 | 20,517 | 20,873 | 17,818 | 19,321 | 17,170 | 20,874 | 23,137 |
| Hudson | 589,377 | 39,048 | 31,935 | 31,710 | 33,910 | 40,068 | 65,116 | 58,982 | 48,645 | 43,147 |
| Hunterdon | 129,655 | 6,931 | 9,074 | 9,822 | 8,996 | 6,917 | 3,891 | 5,434 | 9,474 | 12,271 |
| Mercer | 363,402 | 22,910 | 23,234 | 23,491 | 27,944 | 26,587 | 23,660 | 23,928 | 26,538 | 28,043 |
| Middlesex | 779,830 | 52,238 | 49,611 | 49,805 | 53,924 | 49,427 | 59,824 | 54,816 | 58,582 | 61,428 |
| Monmouth | 641,036 | 38,549 | 43,339 | 46,949 | 46,316 | 36,091 | 29,267 | 32,050 | 44,617 | 54,411 |
| Morris | 485,592 | 29,930 | 33,636 | 34,666 | 32,457 | 26,019 | 21,216 | 26,560 | 36,866 | 43,474 |
| Ocean | 565,525 | 38,128 | 34,609 | 35,533 | 33,504 | 28,994 | 30,586 | 27,668 | 33,542 | 39,053 |
| Passaic | 487,067 | 37,259 | 33,681 | 32,966 | 33,609 | 31,741 | 34,585 | 33,075 | 34,749 | 36,955 |
| Salem | 65,981 | 3,737 | 4,295 | 4,628 | 4,699 | 4,029 | 3,990 | 3,533 | 4,342 | 4,914 |
| Somerset | 320,745 | 21,316 | 22,763 | 23,406 | 20,676 | 15,815 | 15,915 | 20,096 | 24,619 | 29,284 |
| Sussex | 151,632 | 8,642 | 10,100 | 11,605 | 11,512 | 8,136 | 5,935 | 8,033 | 11,431 | 13,793 |
| Union | 519,738 | 37,023 | 35,385 | 35,004 | 34,616 | 30,680 | 32,849 | 34,233 | 39,060 | 41,994 |
| Warren | 109,684 | 6,545 | 7,185 | 7,835 | 7,714 | 5,578 | 5,129 | 6,020 | 8,405 | 9,774 |
| Age Group | ||||||||||
| County | 65 & over | 45-49 | 50-54 | 55-59 | 60-64 | 65-69 | 70-74 | 75-79 | 80-84 | 85+ |
| New Jersey | 1,133,775 | 706,853 | 624,191 | 526,524 | 427,964 | 314,429 | 253,821 | 225,555 | 177,215 | 162,755 |
| Atlantic | 37,386 | 22,659 | 20,133 | 16,761 | 14,375 | 10,872 | 9,011 | 7,545 | 5,422 | 4,536 |
| Bergen | 131,219 | 75,427 | 68,401 | 57,734 | 47,333 | 34,788 | 28,686 | 26,408 | 21,188 | 20,149 |
| Burlington | 58,495 | 38,541 | 33,108 | 28,055 | 22,686 | 16,617 | 13,220 | 12,167 | 9,115 | 7,376 |
| Camden | 63,775 | 40,825 | 37,458 | 31,100 | 24,136 | 17,186 | 14,078 | 12,786 | 10,470 | 9,255 |
| Cape May | 20,301 | 7,654 | 7,708 | 7,437 | 7,163 | 5,874 | 4,580 | 4,059 | 2,954 | 2,834 |
| Cumberland | 19,335 | 11,283 | 9,981 | 8,886 | 7,350 | 5,456 | 4,429 | 3,755 | 3,067 | 2,628 |
| Essex | 88,878 | 58,762 | 51,198 | 44,282 | 34,252 | 25,493 | 19,949 | 16,926 | 13,388 | 13,122 |
| Gloucester | 33,429 | 24,372 | 21,104 | 17,699 | 13,646 | 9,828 | 7,875 | 6,780 | 5,015 | 3,931 |
| Hudson | 63,947 | 41,377 | 36,188 | 30,788 | 24,516 | 18,842 | 14,767 | 12,173 | 9,153 | 9,012 |
| Hunterdon | 14,969 | 13,461 | 11,927 | 9,277 | 7,211 | 4,581 | 3,377 | 2,833 | 2,178 | 2,000 |
| Mercer | 44,362 | 28,658 | 25,721 | 21,702 | 16,624 | 12,100 | 9,854 | 8,738 | 7,147 | 6,523 |
| Middlesex | 94,560 | 61,588 | 54,579 | 44,612 | 34,836 | 25,443 | 21,059 | 19,446 | 15,448 | 13,164 |
| Monmouth | 82,597 | 58,965 | 51,796 | 42,272 | 33,817 | 23,046 | 18,398 | 16,392 | 12,898 | 11,863 |
| Morris | 61,836 | 43,578 | 37,554 | 31,367 | 26,433 | 18,075 | 13,678 | 11,939 | 9,403 | 8,741 |
| Ocean | 118,181 | 40,664 | 36,077 | 34,017 | 34,969 | 29,792 | 26,990 | 24,718 | 19,279 | 17,402 |
| Passaic | 58,415 | 36,823 | 32,828 | 27,976 | 22,405 | 16,525 | 13,014 | 11,375 | 8,973 | 8,528 |
| Salem | 9,248 | 5,400 | 5,144 | 4,460 | 3,562 | 2,600 | 1,983 | 1,809 | 1,494 | 1,362 |
| Somerset | 37,565 | 29,607 | 25,132 | 19,625 | 14,926 | 10,780 | 8,271 | 7,418 | 5,537 | 5,559 |
| Sussex | 15,720 | 14,848 | 13,044 | 10,603 | 8,230 | 5,171 | 3,543 | 2,890 | 2,091 | 2,025 |
| Union | 65,284 | 42,268 | 36,703 | 30,882 | 23,757 | 17,425 | 13,861 | 12,592 | 10,812 | 10,594 |
| Warren | 14,273 | 10,093 | 8,407 | 6,989 | 5,737 | 3,935 | 3,198 | 2,806 | 2,183 | 2,151 |