(CO-99-13) Population Estimates for Counties by Age Group: July 1, 1994 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+ IOWA 2829422 186867 538331 276034 829440 565239 2188352 1986637 433511 59174 Adair County 8285 511 1565 492 2041 1779 6446 6007 1897 296 Adams County 4558 295 808 253 1143 1047 3599 3345 1012 149 Allamakee County 13967 938 2822 906 3728 2893 10659 9821 2680 416 Appanoose County 13624 822 2619 968 3530 2835 10640 9766 2850 397 Audubon County 6943 445 1290 369 1645 1555 5417 5054 1639 264 Benton County 23855 1678 4912 1701 6828 4942 18005 16585 3794 439 Black Hawk County 123648 7767 23260 15802 35206 24210 96132 85602 17403 2043 Boone County 25249 1594 4574 1838 7492 5307 19765 18319 4444 777 Bremer County 23106 1309 4454 2612 6087 4897 18101 16097 3747 548 Buchanan County 21275 1573 4897 1479 5873 4194 15563 14182 3259 362 Buena Vista County 20033 1333 3760 2249 5329 3671 15520 13878 3691 530 Butler County 15710 926 3158 955 4144 3269 12142 11192 3258 454 Calhoun County 11671 680 2188 640 3054 2475 9133 8527 2634 405 Carroll County 21483 1605 4688 1421 5678 4181 15864 14601 3910 599 Cass County 15087 917 2905 868 3991 3229 11720 10898 3177 456 Cedar County 17503 1058 3519 1135 5048 3651 13445 12480 3092 437 Cerro Gordo County 46490 2973 8301 3929 13609 9455 36494 33370 8223 1119 Cherokee County 13870 888 2806 800 3698 3037 10624 9815 2641 385 Chickasaw County 13380 868 2868 833 3618 2815 10110 9280 2378 323 Clarke County 8158 519 1585 528 2228 1731 6314 5831 1567 247 Clay County 17658 1188 3545 1247 5100 3562 13405 12394 3016 446 Clayton County 18792 1226 3946 1186 5015 3945 14259 13137 3474 466 Clinton County 51001 3377 10058 3951 14671 10720 39179 35882 8224 1020 Crawford County 16478 1097 3394 1198 4389 3484 12612 11409 2916 425 Dallas County 32461 2196 6766 2196 10179 6581 24499 22573 4543 627 Davis County 8431 577 1703 591 2226 1800 6427 5889 1534 242 Decatur County 8134 471 1385 1192 1873 1589 6511 5570 1624 280 Delaware County 18361 1342 4211 1317 5105 3687 13446 12283 2699 357 Des Moines County 42801 2682 8170 3406 12427 9125 33203 30511 6991 951 Dickinson County 15398 808 2762 872 4184 3538 12254 11466 3234 391 Dubuque County 88177 5819 17708 9157 25423 17505 67526 60545 12565 1654 Emmet County 11296 647 2300 984 2867 2287 8745 7797 2211 321 Fayette County 21925 1429 4305 1740 5731 4598 16877 15421 4122 558 Floyd County 16730 1013 3243 1164 4223 3726 12994 11999 3361 477 Franklin County 11032 674 2115 666 2966 2385 8565 7979 2226 334 Fremont County 8148 477 1632 498 2081 1746 6298 5809 1714 226 Greene County 10071 586 1868 578 2566 2188 7891 7384 2285 327 Grundy County 12128 732 2323 676 3220 2733 9452 8810 2444 296 Guthrie County 11228 601 2164 632 2871 2663 8799 8204 2297 338 Hamilton County 16044 995 3028 1020 4503 3490 12501 11584 3008 403 Hancock County 12052 795 2519 726 3329 2391 9141 8434 2292 308 Hardin County 18653 1039 3553 1328 4816 3906 14676 13363 4011 627 Harrison County 14875 980 3014 986 3951 3162 11371 10454 2782 443 Henry County 19723 1242 3690 1873 5948 3859 15389 14046 3111 485 Howard County 9783 628 1974 548 2449 2052 7479 6970 2132 334 Humboldt County 10425 635 1987 584 2702 2295 8103 7545 2222 279 Ida County 8325 582 1715 447 2195 1672 6305 5837 1714 272 Iowa County 14946 1027 2790 950 4290 3173 11560 10766 2716 398 Jackson County 20221 1351 4232 1465 5432 4394 15338 14024 3347 428 Jasper County 35167 2109 6710 2529 10213 7820 27466 25348 5786 692 Jefferson County 16805 1038 3051 1113 6029 3247 13193 12241 2327 325 Johnson County 100379 6223 13897 23904 34607 14017 82260 70257 7731 1020 Jones County 19959 1220 3829 1691 5952 4059 15515 14263 3208 419 Keokuk County 11522 707 2275 731 3031 2440 8888 8217 2338 359 Kossuth County 18162 1183 3825 994 4773 3890 13756 12733 3497 527 Lee County 38932 2445 7477 2922 11450 8221 30222 27862 6417 812 Linn County 176855 11831 32171 18463 56731 35897 138010 125054 21762 2674 Louisa County 11752 770 2438 980 3415 2427 8928 8146 1722 257 Lucas County 9017 535 1647 594 2313 2078 7093 6563 1850 271 Lyon County 11900 884 2671 768 3041 2383 8766 8003 2153 320 Madison County 13034 837 2747 887 3683 2711 9909 9037 2169 338 Mahaska County 21725 1483 4199 1913 6117 4257 16696 15238 3756 507 Marion County 30684 1922 5915 3264 8426 6147 23772 21275 5010 649 Marshall County 38256 2356 7143 2896 11014 8198 29941 27533 6649 923 Mills County 13556 823 2900 932 4246 2819 10352 9404 1836 238 Mitchell County 11057 686 2177 687 2728 2401 8578 7914 2378 414 Monona County 10103 557 1894 541 2444 2270 7955 7407 2397 379 Monroe County 8158 481 1605 561 2141 1774 6322 5840 1596 252 Montgomery County 11969 694 2256 756 3242 2469 9394 8662 2552 418 Muscatine County 41026 2926 8511 3574 12548 8011 30890 28149 5456 771 O'Brien County 15333 954 3106 961 3965 3162 11744 10842 3185 514 Osceola County 7148 484 1448 480 1866 1492 5444 5004 1378 244 Page County 16754 929 3214 1108 4500 3525 13140 12103 3478 546 Palo Alto County 10406 619 2120 723 2493 2251 8006 7273 2200 371 Plymouth County 24259 1694 5337 1848 6501 4920 18011 16419 3959 588 Pocahontas County 9122 586 1740 425 2288 2044 7058 6601 2039 322 Polk County 346646 25038 61186 36632 116976 67096 269875 246751 39718 4829 Pottawattamie County 83350 5957 16446 7041 24787 17577 63520 58003 11542 1352 Poweshiek County 18963 1099 3472 2294 5012 3797 14983 13180 3289 488 Ringgold County 5334 276 968 276 1259 1221 4247 3966 1334 199 Sac County 12109 775 2411 673 3051 2525 9270 8643 2674 443 Scott County 156043 11505 31593 14875 49611 30426 117760 107173 18033 1982 Shelby County 13116 818 2659 794 3355 2758 10057 9293 2732 403 Sioux County 31247 2288 6904 4013 7826 5591 23018 19929 4625 607 Story County 74206 4250 10513 20076 20982 10868 60998 50785 7517 1078 Tama County 17751 1098 3480 1227 4589 3954 13725 12683 3403 534 Taylor County 7109 400 1412 405 1737 1524 5511 5113 1631 240 Union County 12439 740 2472 1003 3422 2496 9643 8739 2306 374 Van Buren County 7737 526 1476 505 2001 1679 5950 5536 1550 204 Wapello County 35976 2213 6384 3078 9997 7726 28418 25922 6578 848 Warren County 38353 2607 8083 3743 11742 7938 28994 25847 4240 596 Washington County 20253 1419 3959 1410 5760 4038 15479 14334 3667 582 Wayne County 6893 410 1201 375 1634 1490 5475 5132 1783 308 Webster County 39435 2708 7447 3105 10891 8205 30419 27985 7079 1068 Winnebago County 11901 748 2242 1023 3227 2327 9279 8296 2334 346 Winneshiek County 20982 1308 3728 3461 5330 3877 16531 14080 3278 468 Woodbury County 101296 7432 20912 9435 29981 19043 76090 68982 14493 1944 Worth County 7833 465 1461 505 2078 1705 6136 5689 1619 279 Wright County 14218 896 2540 884 3733 3019 11167 10453 3146 493 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.