(CO-99-13) Population Estimates for Counties by Age Group: July 1, 1991 Source: Population Estimates Program, Population Division, U.S. Census Bureau, Washington, DC 20233 Contact: Statistical Information Staff, Population Division, U.S. Census Bureau (301-457-2422) pop@census.gov (please include a phone number with email correspondence) Internet Release Date: August 30, 2000 Total Ages Ages Ages Ages Ages Ages Ages Ages Ages Area Name Population 0-4 5-17 18-24 25-44 45-64 16+ 21+ 65+ 85+ ILLINOIS 11535973 881610 2101734 1190488 3760996 2150154 8861493 8038747 1450991 151440 Adams County 66474 4713 12422 5906 18837 12924 51101 46623 11672 1595 Alexander County 10586 926 2151 807 2767 2059 7815 7165 1876 217 Bond County 15126 971 2719 1720 4238 2855 11820 10629 2623 323 Boone County 31671 2453 6404 2930 9988 6262 23796 21493 3634 399 Brown County 6163 329 982 699 2184 1011 4982 4598 958 149 Bureau County 35700 2388 7038 2715 10041 7050 27328 25023 6468 760 Calhoun County 5281 344 942 411 1362 1153 4137 3817 1069 123 Carroll County 16636 1072 3100 1189 4594 3511 12956 11934 3170 399 Cass County 13441 888 2581 1100 3873 2694 10353 9508 2305 322 Champaign County 173952 12216 25871 38848 56820 24823 139510 116496 15374 1721 Christian County 35081 2398 6341 2933 10182 7070 27328 25045 6157 799 Clark County 15882 1048 2854 1239 4444 3227 12399 11421 3070 384 Clay County 14513 921 2777 1085 4098 2867 11208 10344 2765 380 Clinton County 34037 2381 6802 3195 10666 6281 25835 23540 4712 543 Coles County 51521 2893 7817 11638 13508 8532 41925 34548 7133 887 Cook County 5124753 397992 893146 536296 1704449 956068 3968160 3617352 636802 60055 Crawford County 20082 1252 3584 1617 5975 4102 15796 14498 3552 372 Cumberland County 10764 819 2185 914 3047 2083 8077 7360 1716 196 DeKalb County 79272 5078 11936 19692 22479 11901 63988 52428 8186 991 De Witt County 16613 1139 3151 1289 4932 3363 12759 11760 2739 332 Douglas County 19452 1437 4053 1398 5649 3953 14530 13342 2962 346 DuPage County 800222 66251 144802 73552 296810 147974 609566 559550 70833 6841 Edgar County 19461 1261 3722 1411 5413 3973 15060 13830 3681 493 Edwards County 7391 470 1360 562 2088 1452 5752 5302 1459 173 Effingham County 31887 2804 6780 2603 9627 5593 23201 21187 4480 531 Fayette County 20770 1366 3807 1730 6154 4007 16146 14831 3706 450 Ford County 14043 935 2698 941 3939 2802 10805 10003 2728 438 Franklin County 40207 2481 7198 3297 11073 8083 31719 29015 8075 888 Fulton County 38220 2231 7051 3138 11068 7535 30005 27571 7197 869 Gallatin County 6805 420 1194 573 1799 1513 5388 4917 1306 154 Greene County 15261 1085 2968 1218 4096 3035 11630 10680 2859 363 Grundy County 33247 2427 6791 2832 10699 6218 25027 22794 4280 435 Hamilton County 8465 506 1521 568 2272 1753 6657 6165 1845 232 Hancock County 21416 1375 4134 1496 6007 4391 16486 15216 4013 496 Hardin County 5127 281 938 447 1450 1106 4042 3699 905 107 Henderson County 8134 529 1566 537 2321 1885 6293 5782 1296 148 Henry County 51085 3464 10276 3852 14689 10422 38771 35529 8382 1027 Iroquois County 30883 2051 5936 2157 8584 6447 23758 21931 5708 704 Jackson County 60706 3428 8203 16930 17095 8489 50247 40801 6561 681 Jasper County 10597 780 2232 770 2995 2000 7885 7232 1820 250 Jefferson County 37060 2764 7210 2979 10990 6984 28107 25778 6133 687 Jersey County 20751 1471 4094 2176 6071 4055 15802 14171 2884 313 Jo Daviess County 21911 1440 4280 1628 6204 4611 16845 15463 3748 419 Johnson County 11548 560 1730 1143 4009 2389 9551 8802 1717 181 Kane County 326394 29324 68174 31352 112296 55148 238361 215331 30100 3528 Kankakee County 97425 7638 19921 9308 29138 18144 72748 65607 13276 1309 Kendall County 40391 3141 8917 3526 13485 7769 29643 26723 3553 325 Knox County 56344 3447 9988 5097 16595 11468 44422 40535 9749 1292 Lake County 530207 46105 100731 55264 187243 96094 397355 357421 44770 4306 La Salle County 107377 7363 20055 9030 31041 21345 82890 75805 18543 2146 Lawrence County 15969 979 2835 1172 4450 3214 12562 11616 3319 477 Lee County 34676 2434 6545 2887 11088 6636 26608 24489 5086 609 Livingston County 39088 2691 7178 3239 12478 7329 30261 27920 6173 956 Logan County 30783 1984 5314 3134 9608 5810 24248 21980 4933 721 McDonough County 35242 1751 4699 10118 8406 5417 29527 23075 4851 693 McHenry County 192470 16878 39195 15541 68805 34120 141701 129745 17931 1812 McLean County 131639 8929 21702 26583 40294 20538 103978 87639 13593 1706 Macon County 117698 8242 22373 10549 35449 23933 90370 82090 17152 1978 Macoupin County 47895 3143 9293 3940 13433 9476 36854 33649 8610 1087 Madison County 251821 18408 46160 23608 78652 49846 194138 177151 35147 3544 Marion County 41574 2958 8121 3324 11992 8125 31676 28977 7054 827 Marshall County 12809 774 2442 973 3526 2607 9963 9148 2487 324 Mason County 16448 1105 3185 1270 4621 3391 12631 11578 2876 327 Massac County 14804 856 2665 1133 4113 3181 11698 10748 2856 349 Menard County 11261 780 2301 773 3501 2213 8502 7813 1693 222 Mercer County 17316 1139 3472 1281 4995 3615 13236 12121 2814 356 Monroe County 22983 1693 4458 1842 7314 4595 17404 16055 3081 373 Montgomery County 30746 2084 5721 2453 9161 5722 23746 21907 5605 774 Morgan County 36399 2353 6547 3850 10811 7036 28444 25645 5802 770 Moultrie County 13947 961 2719 951 3932 2727 10675 9859 2657 499 Ogle County 46914 3480 9445 3721 14479 9255 35334 32338 6534 818 Peoria County 183956 13292 34619 19390 55547 34955 141171 126887 26153 2904 Perry County 21378 1472 4166 1769 6182 4110 16369 14926 3679 438 Piatt County 15629 1006 3011 1084 4776 3333 12052 11087 2419 300 Pike County 17476 1126 3223 1305 4689 3501 13583 12518 3632 493 Pope County 4461 220 804 544 1221 895 3630 3153 777 95 Pulaski County 7441 557 1619 562 1896 1444 5487 4996 1363 183 Putnam County 5747 406 1095 431 1672 1240 4405 4032 903 69 Randolph County 34456 2147 6266 3220 11183 6276 26952 24793 5364 649 Richland County 16619 1153 3163 1284 4732 3378 12743 11683 2909 368 Rock Island County 149211 10523 27535 13949 44864 29986 115046 104703 22354 2279 St. Clair County 262395 21597 53224 25226 81816 46933 195451 176446 33599 3545 Saline County 26362 1632 4747 2045 7158 5457 20803 19000 5323 640 Sangamon County 181596 13358 33174 15191 60722 34302 139653 128853 24849 2768 Schuyler County 7552 450 1432 558 2139 1546 5892 5409 1427 195 Scott County 5584 385 1084 419 1585 1129 4263 3923 982 126 Shelby County 22310 1524 4247 1741 6191 4592 17156 15752 4015 473 Stark County 6447 411 1245 441 1759 1335 4985 4591 1256 157 Stephenson County 48207 3459 8966 4035 14439 9553 37111 33914 7755 880 Tazewell County 124595 8586 24268 10443 38474 26086 95332 87056 16738 1780 Union County 17663 1089 3023 1374 5040 3801 14037 12931 3336 362 Vermilion County 87887 5992 16786 7128 26123 17843 67679 61897 14015 1457 Wabash County 13107 851 2565 1118 3879 2545 10069 9127 2149 245 Warren County 19215 1244 3747 1948 5286 3690 14772 13292 3300 475 Washington County 14862 1007 2903 1060 4263 2872 11355 10477 2757 348 Wayne County 17002 1083 3079 1373 4561 3541 13323 12204 3365 399 White County 16377 1010 2847 1122 4594 3402 12911 12040 3402 390 Whiteside County 60455 4265 11979 4972 17899 12180 46120 41871 9160 962 Will County 366975 30935 78535 35449 126602 63517 268737 241552 31937 2902 Williamson County 57877 3759 10144 4999 17459 11715 45577 41761 9801 1084 Winnebago County 256928 19953 47568 23536 83664 49420 196536 179285 32787 3604 Woodford County 33386 2440 7167 2692 10089 6317 24772 22450 4681 569 The estimates presented here were produced by a method which is still in a developmental stage. They may not be accurate for populations which are very small or have unusual distributions. These figures should be used with caution.