| FIPS | Geography | Total households 1990 | 1990 Household Income Level | Median income 1990 | Total households 2000 | 2000 Household Income Level | |||||||||||||
| < $15k | $15k..24.9k | $25k..$34.9k | $35k..$44.9k | $45k..$59.9k | $60k..$99.9k | $100k or more | < $15k | $15k..24.9k | $25k..$34.9k | $35k..$44.9k | $45k..$59.9k | $60k..$99.9k | $100k or more | Median income 2000 | |||||
| 19000 | State of Iowa | 1,065,243 | 284,659 | 221,213 | 194,997 | 142,162 | 119,777 | 80,157 | 22,278 | 26,229 | 1,150,197 | 171,116 | 165,122 | 168,713 | 152,691 | 183,135 | 225,687 | 83,733 | 39,469 |
| 19001 | Adair County, Iowa | 3,418 | 1,128 | 854 | 631 | 405 | 265 | 95 | 40 | 21,426 | 3,398 | 505 | 613 | 571 | 493 | 573 | 521 | 122 | 35,179 |
| 19003 | Adams County, Iowa | 2,020 | 759 | 481 | 395 | 224 | 75 | 56 | 30 | 20,570 | 1,863 | 347 | 394 | 316 | 197 | 343 | 209 | 57 | 30,453 |
| 19005 | Allamakee County, Iowa | 5,291 | 1,851 | 1,228 | 859 | 615 | 405 | 244 | 89 | 21,098 | 5,730 | 920 | 999 | 1,041 | 864 | 858 | 823 | 225 | 33,967 |
| 19007 | Appanoose County, Iowa | 5,663 | 2,427 | 1,187 | 818 | 523 | 399 | 253 | 56 | 17,833 | 5,792 | 1,420 | 1,086 | 1,044 | 790 | 733 | 575 | 144 | 28,612 |
| 19009 | Audubon County, Iowa | 2,949 | 977 | 750 | 548 | 300 | 171 | 157 | 46 | 21,501 | 2,767 | 502 | 474 | 519 | 420 | 400 | 315 | 137 | 32,215 |
| 19011 | Benton County, Iowa | 8,541 | 2,336 | 1,798 | 1,528 | 1,247 | 1,024 | 528 | 80 | 25,959 | 9,782 | 1,288 | 1,179 | 1,388 | 1,381 | 1,710 | 2,371 | 465 | 42,427 |
| 19013 | Black Hawk County, Iowa | 47,162 | 13,906 | 9,103 | 7,400 | 5,789 | 5,915 | 4,110 | 939 | 25,683 | 49,736 | 8,482 | 7,193 | 7,588 | 6,356 | 7,202 | 9,401 | 3,514 | 37,266 |
| 19015 | Boone County, Iowa | 9,812 | 2,644 | 2,052 | 1,829 | 1,409 | 1,154 | 576 | 148 | 26,110 | 10,415 | 1,430 | 1,367 | 1,556 | 1,455 | 1,833 | 2,149 | 625 | 40,763 |
| 19017 | Bremer County, Iowa | 8,413 | 2,215 | 1,596 | 1,646 | 1,177 | 1,030 | 632 | 117 | 27,326 | 8,834 | 1,044 | 1,279 | 1,357 | 1,146 | 1,504 | 1,907 | 597 | 40,826 |
| 19019 | Buchanan County, Iowa | 7,564 | 2,390 | 1,647 | 1,237 | 996 | 682 | 509 | 103 | 23,386 | 7,923 | 1,210 | 1,183 | 1,208 | 1,113 | 1,364 | 1,411 | 434 | 38,036 |
| 19021 | Buena Vista County, Iowa | 7,530 | 1,910 | 1,784 | 1,645 | 1,032 | 651 | 376 | 132 | 25,311 | 7,514 | 1,233 | 1,362 | 1,130 | 1,136 | 1,049 | 1,227 | 377 | 35,300 |
| 19023 | Butler County, Iowa | 6,047 | 1,812 | 1,424 | 1,164 | 771 | 491 | 310 | 75 | 23,292 | 6,139 | 1,017 | 940 | 1,014 | 925 | 956 | 1,042 | 245 | 35,883 |
| 19025 | Calhoun County, Iowa | 4,667 | 1,474 | 1,114 | 920 | 463 | 387 | 232 | 77 | 22,496 | 4,496 | 878 | 793 | 686 | 613 | 749 | 555 | 222 | 33,286 |
| 19027 | Carroll County, Iowa | 8,021 | 2,377 | 1,750 | 1,620 | 1,013 | 741 | 374 | 146 | 24,391 | 8,480 | 1,385 | 1,217 | 1,426 | 1,021 | 1,411 | 1,528 | 492 | 37,275 |
| 19029 | Cass County, Iowa | 6,172 | 1,942 | 1,581 | 1,067 | 733 | 470 | 294 | 85 | 21,801 | 6,115 | 1,073 | 1,068 | 1,111 | 926 | 909 | 751 | 277 | 32,922 |
| 19031 | Cedar County, Iowa | 6,769 | 1,671 | 1,319 | 1,390 | 1,037 | 816 | 429 | 107 | 27,713 | 7,159 | 909 | 852 | 1,037 | 1,041 | 1,371 | 1,586 | 363 | 42,198 |
| 19033 | Cerro Gordo County, Iowa | 19,044 | 5,134 | 4,344 | 3,555 | 2,622 | 1,897 | 1,182 | 310 | 25,116 | 19,354 | 3,326 | 3,482 | 2,636 | 2,387 | 3,074 | 3,298 | 1,151 | 35,867 |
| 19035 | Cherokee County, Iowa | 5,589 | 1,714 | 1,335 | 1,146 | 554 | 483 | 279 | 78 | 22,967 | 5,377 | 845 | 973 | 854 | 816 | 850 | 826 | 213 | 35,142 |
| 19037 | Chickasaw County, Iowa | 5,038 | 1,365 | 1,187 | 1,106 | 616 | 424 | 293 | 47 | 24,656 | 5,188 | 807 | 703 | 846 | 811 | 987 | 830 | 204 | 37,649 |
| 19039 | Clarke County, Iowa | 3,347 | 1,085 | 799 | 598 | 288 | 326 | 187 | 64 | 21,735 | 3,588 | 579 | 706 | 533 | 433 | 572 | 608 | 157 | 34,474 |
| 19041 | Clay County, Iowa | 7,009 | 2,048 | 1,452 | 1,410 | 1,003 | 641 | 303 | 152 | 25,028 | 7,274 | 1,243 | 1,174 | 1,128 | 1,162 | 1,054 | 1,096 | 417 | 35,799 |
| 19043 | Clayton County, Iowa | 7,206 | 2,354 | 1,924 | 1,159 | 840 | 585 | 265 | 79 | 21,406 | 7,381 | 1,197 | 1,305 | 1,291 | 1,135 | 1,190 | 978 | 285 | 34,068 |
| 19045 | Clinton County, Iowa | 19,869 | 5,527 | 4,264 | 3,357 | 2,868 | 2,374 | 1,281 | 198 | 25,410 | 20,156 | 3,410 | 2,993 | 2,947 | 2,626 | 3,485 | 3,875 | 820 | 37,423 |
| 19047 | Crawford County, Iowa | 6,397 | 2,025 | 1,626 | 1,259 | 669 | 509 | 269 | 40 | 22,209 | 6,458 | 1,145 | 1,074 | 1,132 | 1,002 | 935 | 967 | 203 | 33,922 |
| 19049 | Dallas County, Iowa | 11,182 | 2,596 | 2,207 | 1,903 | 1,744 | 1,376 | 1,113 | 243 | 28,874 | 15,592 | 1,570 | 1,826 | 2,034 | 1,771 | 2,350 | 4,001 | 2,040 | 48,528 |
| 19051 | Davis County, Iowa | 3,135 | 1,090 | 849 | 578 | 272 | 222 | 113 | 11 | 20,054 | 3,205 | 607 | 604 | 459 | 389 | 556 | 485 | 105 | 32,864 |
| 19053 | Decatur County, Iowa | 3,228 | 1,367 | 773 | 469 | 322 | 167 | 113 | 17 | 18,105 | 3,352 | 903 | 594 | 602 | 400 | 403 | 332 | 118 | 27,343 |
| 19055 | Delaware County, Iowa | 6,360 | 1,750 | 1,302 | 1,280 | 910 | 595 | 358 | 165 | 25,757 | 6,861 | 1,002 | 1,135 | 1,055 | 934 | 1,104 | 1,251 | 380 | 37,168 |
| 19057 | Des Moines County, Iowa | 16,933 | 4,606 | 3,374 | 3,116 | 2,419 | 2,051 | 1,145 | 222 | 26,536 | 17,293 | 2,734 | 2,802 | 2,587 | 2,293 | 2,848 | 3,087 | 942 | 36,790 |
| 19059 | Dickinson County, Iowa | 6,161 | 1,590 | 1,459 | 1,212 | 756 | 511 | 416 | 217 | 25,211 | 7,094 | 985 | 1,055 | 1,060 | 997 | 1,207 | 1,254 | 536 | 39,020 |
| 19061 | Dubuque County, Iowa | 30,689 | 7,352 | 6,033 | 5,797 | 4,302 | 3,952 | 2,505 | 748 | 28,276 | 33,703 | 4,394 | 5,051 | 5,035 | 4,759 | 5,482 | 6,551 | 2,431 | 39,582 |
| 19063 | Emmet County, Iowa | 4,477 | 1,433 | 1,084 | 878 | 442 | 368 | 224 | 48 | 22,790 | 4,446 | 691 | 801 | 830 | 611 | 680 | 634 | 199 | 33,305 |
| 19065 | Fayette County, Iowa | 8,499 | 2,970 | 1,921 | 1,515 | 1,024 | 625 | 317 | 127 | 21,109 | 8,833 | 1,740 | 1,600 | 1,372 | 1,332 | 1,245 | 1,212 | 332 | 32,453 |
| 19067 | Floyd County, Iowa | 6,713 | 2,119 | 1,476 | 1,321 | 791 | 581 | 312 | 113 | 23,344 | 6,807 | 1,222 | 1,223 | 930 | 1,011 | 1,127 | 1,040 | 254 | 35,237 |
| 19069 | Franklin County, Iowa | 4,581 | 1,440 | 993 | 954 | 480 | 392 | 262 | 60 | 23,741 | 4,370 | 677 | 707 | 751 | 528 | 706 | 779 | 222 | 36,042 |
| 19071 | Fremont County, Iowa | 3,202 | 1,021 | 713 | 627 | 446 | 254 | 103 | 38 | 22,948 | 3,208 | 575 | 469 | 445 | 365 | 676 | 526 | 152 | 38,345 |
| 19073 | Greene County, Iowa | 4,226 | 1,284 | 1,086 | 847 | 485 | 299 | 183 | 42 | 22,320 | 4,202 | 806 | 696 | 662 | 577 | 653 | 670 | 138 | 33,883 |
| 19075 | Grundy County, Iowa | 4,790 | 1,211 | 1,050 | 992 | 683 | 480 | 303 | 71 | 26,314 | 4,964 | 586 | 685 | 794 | 782 | 894 | 955 | 268 | 39,396 |
| 19077 | Guthrie County, Iowa | 4,454 | 1,344 | 1,075 | 869 | 520 | 347 | 246 | 53 | 23,356 | 4,656 | 731 | 784 | 691 | 636 | 716 | 792 | 306 | 36,495 |
| 19079 | Hamilton County, Iowa | 6,407 | 1,667 | 1,423 | 1,250 | 1,104 | 556 | 329 | 78 | 25,847 | 6,689 | 960 | 984 | 1,014 | 1,007 | 1,106 | 1,291 | 327 | 38,658 |
| 19081 | Hancock County, Iowa | 4,844 | 1,192 | 1,172 | 1,145 | 676 | 443 | 150 | 66 | 25,445 | 4,792 | 564 | 751 | 837 | 811 | 837 | 778 | 214 | 37,703 |
| 19083 | Hardin County, Iowa | 7,602 | 2,245 | 1,830 | 1,503 | 853 | 696 | 370 | 105 | 23,457 | 7,636 | 1,168 | 1,306 | 1,287 | 1,198 | 1,117 | 1,242 | 318 | 35,429 |
| 19085 | Harrison County, Iowa | 5,630 | 1,885 | 1,237 | 1,062 | 613 | 466 | 313 | 54 | 22,258 | 6,104 | 952 | 913 | 921 | 891 | 1,030 | 1,115 | 282 | 38,141 |
| 19087 | Henry County, Iowa | 7,092 | 1,925 | 1,629 | 1,316 | 1,060 | 747 | 298 | 117 | 24,952 | 7,627 | 1,282 | 1,038 | 1,065 | 1,066 | 1,344 | 1,400 | 432 | 39,087 |
| 19089 | Howard County, Iowa | 3,805 | 1,274 | 925 | 755 | 450 | 229 | 108 | 64 | 21,913 | 3,982 | 701 | 647 | 665 | 552 | 670 | 558 | 189 | 34,641 |
| 19091 | Humboldt County, Iowa | 4,360 | 1,170 | 1,049 | 952 | 535 | 320 | 244 | 90 | 24,557 | 4,305 | 657 | 653 | 650 | 607 | 765 | 728 | 245 | 38,201 |
| 19093 | Ida County, Iowa | 3,230 | 1,006 | 770 | 588 | 353 | 303 | 148 | 62 | 22,859 | 3,197 | 599 | 480 | 528 | 479 | 504 | 459 | 148 | 34,805 |
| 19095 | Iowa County, Iowa | 5,703 | 1,414 | 1,248 | 1,158 | 877 | 574 | 342 | 90 | 26,579 | 6,186 | 748 | 863 | 954 | 889 | 1,186 | 1,294 | 252 | 41,222 |
| 19097 | Jackson County, Iowa | 7,535 | 2,464 | 1,662 | 1,403 | 812 | 731 | 394 | 69 | 22,487 | 8,096 | 1,432 | 1,373 | 1,309 | 1,070 | 1,308 | 1,305 | 299 | 34,529 |
| 19099 | Jasper County, Iowa | 13,667 | 3,086 | 2,680 | 2,751 | 2,094 | 1,842 | 997 | 217 | 28,702 | 14,694 | 1,926 | 2,004 | 2,150 | 1,944 | 2,489 | 3,257 | 924 | 41,683 |
| 19101 | Jefferson County, Iowa | 6,277 | 2,001 | 1,366 | 1,107 | 858 | 516 | 306 | 123 | 22,630 | 6,651 | 1,211 | 1,081 | 1,125 | 812 | 752 | 1,125 | 545 | 33,851 |
| 19103 | Johnson County, Iowa | 36,118 | 9,634 | 6,559 | 5,707 | 4,222 | 4,501 | 3,828 | 1,667 | 27,862 | 44,074 | 7,677 | 5,931 | 5,602 | 4,916 | 5,617 | 9,094 | 5,237 | 40,060 |
| 19105 | Jones County, Iowa | 6,847 | 1,859 | 1,644 | 1,363 | 899 | 586 | 410 | 86 | 24,480 | 7,577 | 1,194 | 1,019 | 1,263 | 1,064 | 1,286 | 1,400 | 351 | 37,449 |
| 19107 | Keokuk County, Iowa | 4,592 | 1,403 | 1,147 | 915 | 553 | 346 | 185 | 43 | 22,234 | 4,574 | 822 | 831 | 680 | 624 | 827 | 604 | 186 | 34,025 |
| 19109 | Kossuth County, Iowa | 7,256 | 2,126 | 1,776 | 1,570 | 823 | 518 | 334 | 109 | 23,321 | 6,959 | 1,252 | 1,107 | 1,165 | 1,008 | 1,066 | 1,036 | 325 | 34,562 |
| 19111 | Lee County, Iowa | 14,942 | 4,513 | 3,055 | 2,546 | 1,962 | 1,751 | 910 | 205 | 24,671 | 15,186 | 2,525 | 2,298 | 2,468 | 2,186 | 2,264 | 2,624 | 821 | 36,193 |
| 19113 | Linn County, Iowa | 65,242 | 13,171 | 11,253 | 11,469 | 10,118 | 10,267 | 7,103 | 1,861 | 32,137 | 76,806 | 8,346 | 9,255 | 9,911 | 9,636 | 12,732 | 19,106 | 7,820 | 46,206 |
| 19115 | Louisa County, Iowa | 4,336 | 1,201 | 904 | 863 | 603 | 458 | 252 | 55 | 25,590 | 4,526 | 604 | 705 | 714 | 607 | 835 | 847 | 214 | 39,086 |
| 19117 | Lucas County, Iowa | 3,755 | 1,339 | 787 | 648 | 452 | 326 | 151 | 52 | 21,316 | 3,776 | 908 | 589 | 626 | 480 | 600 | 467 | 106 | 30,876 |
| 19119 | Lyon County, Iowa | 4,330 | 1,331 | 1,032 | 942 | 472 | 281 | 228 | 44 | 22,676 | 4,395 | 631 | 627 | 784 | 623 | 849 | 689 | 192 | 36,878 |
| 19121 | Madison County, Iowa | 4,792 | 1,287 | 913 | 1,027 | 680 | 504 | 325 | 56 | 26,644 | 5,315 | 811 | 621 | 764 | 675 | 907 | 1,130 | 407 | 41,845 |
| 19123 | Mahaska County, Iowa | 8,342 | 2,589 | 1,867 | 1,650 | 1,011 | 712 | 398 | 115 | 23,115 | 8,881 | 1,520 | 1,184 | 1,381 | 1,338 | 1,527 | 1,511 | 420 | 37,314 |
| 19125 | Marion County, Iowa | 10,811 | 2,486 | 2,137 | 2,461 | 1,449 | 1,393 | 667 | 218 | 27,991 | 12,055 | 1,770 | 1,427 | 1,538 | 1,667 | 2,070 | 2,814 | 769 | 42,401 |
| 19127 | Marshall County, Iowa | 14,933 | 3,503 | 3,030 | 2,666 | 2,203 | 2,087 | 1,192 | 252 | 28,333 | 15,323 | 2,227 | 2,226 | 2,431 | 2,068 | 2,526 | 2,998 | 847 | 38,268 |
| 19129 | Mills County, Iowa | 4,693 | 1,119 | 1,032 | 809 | 756 | 572 | 360 | 45 | 27,420 | 5,336 | 656 | 778 | 770 | 625 | 926 | 1,153 | 428 | 42,428 |
| 19131 | Mitchell County, Iowa | 4,242 | 1,235 | 932 | 880 | 580 | 360 | 227 | 28 | 24,519 | 4,317 | 740 | 719 | 708 | 691 | 569 | 740 | 150 | 34,843 |
| 19133 | Monona County, Iowa | 4,123 | 1,493 | 1,025 | 730 | 410 | 266 | 110 | 89 | 20,714 | 4,206 | 926 | 640 | 645 | 639 | 630 | 556 | 170 | 33,235 |
| 19135 | Monroe County, Iowa | 3,180 | 1,149 | 776 | 551 | 278 | 218 | 172 | 36 | 20,745 | 3,222 | 640 | 450 | 527 | 523 | 455 | 490 | 137 | 34,877 |
| 19137 | Montgomery County, Iowa | 4,979 | 1,553 | 1,110 | 960 | 686 | 370 | 232 | 68 | 23,312 | 4,892 | 932 | 881 | 793 | 753 | 644 | 693 | 196 | 33,214 |
| 19139 | Muscatine County, Iowa | 14,734 | 3,461 | 2,669 | 2,724 | 2,401 | 1,955 | 1,255 | 269 | 29,786 | 15,883 | 2,114 | 2,257 | 2,246 | 1,947 | 2,605 | 3,559 | 1,155 | 41,803 |
| 19141 | O'Brien County, Iowa | 5,990 | 1,758 | 1,495 | 1,111 | 792 | 455 | 318 | 61 | 23,125 | 5,997 | 871 | 1,001 | 1,037 | 968 | 1,025 | 871 | 224 | 35,758 |
| 19143 | Osceola County, Iowa | 2,836 | 872 | 685 | 477 | 362 | 219 | 170 | 51 | 23,037 | 2,778 | 505 | 456 | 464 | 371 | 464 | 384 | 134 | 34,274 |
| 19145 | Page County, Iowa | 6,720 | 2,256 | 1,509 | 1,168 | 749 | 629 | 319 | 90 | 22,050 | 6,709 | 1,306 | 1,010 | 977 | 981 | 1,066 | 1,064 | 305 | 35,466 |
| 19147 | Palo Alto County, Iowa | 4,226 | 1,407 | 1,093 | 763 | 453 | 271 | 184 | 55 | 21,223 | 4,119 | 753 | 709 | 740 | 535 | 671 | 515 | 196 | 32,409 |
| 19149 | Plymouth County, Iowa | 8,407 | 2,122 | 1,700 | 1,718 | 1,207 | 920 | 573 | 167 | 26,796 | 9,385 | 1,145 | 1,305 | 1,372 | 1,208 | 1,658 | 1,979 | 718 | 41,638 |
| 19151 | Pocahontas County, Iowa | 3,866 | 1,155 | 915 | 734 | 514 | 311 | 189 | 48 | 23,517 | 3,623 | 710 | 598 | 607 | 478 | 593 | 466 | 171 | 33,362 |
| 19153 | Polk County, Iowa | 129,318 | 26,470 | 23,390 | 23,138 | 18,654 | 18,092 | 14,952 | 4,622 | 31,221 | 149,316 | 17,066 | 17,704 | 19,492 | 18,432 | 23,519 | 35,566 | 17,537 | 46,116 |
| 19155 | Pottawattamie County, Iowa | 31,262 | 7,671 | 6,832 | 6,456 | 4,239 | 3,339 | 2,255 | 470 | 26,639 | 33,896 | 4,677 | 4,683 | 5,230 | 4,578 | 5,484 | 6,927 | 2,317 | 40,089 |
| 19157 | Poweshiek County, Iowa | 7,133 | 1,861 | 1,515 | 1,445 | 965 | 792 | 406 | 149 | 26,063 | 7,421 | 1,153 | 1,098 | 1,122 | 1,047 | 1,239 | 1,298 | 464 | 37,836 |
| 19159 | Ringgold County, Iowa | 2,235 | 869 | 515 | 395 | 253 | 128 | 47 | 28 | 20,761 | 2,232 | 532 | 405 | 431 | 260 | 290 | 240 | 74 | 29,110 |
| 19161 | Sac County, Iowa | 4,936 | 1,527 | 1,293 | 963 | 504 | 355 | 226 | 68 | 21,818 | 4,748 | 911 | 828 | 794 | 696 | 718 | 627 | 174 | 32,874 |
| 19163 | Scott County, Iowa | 57,329 | 13,585 | 10,362 | 9,466 | 7,856 | 8,068 | 6,547 | 1,445 | 29,979 | 62,367 | 8,906 | 8,354 | 8,177 | 7,216 | 9,664 | 14,115 | 5,935 | 42,701 |
| 19165 | Shelby County, Iowa | 4,999 | 1,413 | 1,399 | 917 | 563 | 374 | 224 | 109 | 22,702 | 5,202 | 739 | 808 | 844 | 762 | 941 | 862 | 246 | 37,442 |
| 19167 | Sioux County, Iowa | 9,993 | 2,441 | 2,386 | 2,180 | 1,366 | 917 | 475 | 228 | 25,692 | 10,682 | 1,486 | 1,346 | 1,585 | 1,772 | 2,077 | 1,844 | 572 | 40,536 |
| 19169 | Story County, Iowa | 26,015 | 7,211 | 4,978 | 4,316 | 3,240 | 3,036 | 2,589 | 645 | 26,668 | 29,386 | 4,752 | 4,208 | 3,720 | 3,466 | 4,399 | 6,044 | 2,797 | 40,442 |
| 19171 | Tama County, Iowa | 6,773 | 1,907 | 1,579 | 1,349 | 884 | 568 | 386 | 100 | 24,297 | 7,020 | 1,077 | 1,038 | 1,127 | 1,036 | 1,248 | 1,192 | 302 | 37,419 |
| 19173 | Taylor County, Iowa | 2,866 | 1,140 | 773 | 423 | 281 | 177 | 65 | 7 | 18,641 | 2,817 | 634 | 487 | 480 | 389 | 408 | 352 | 67 | 31,297 |
| 19175 | Union County, Iowa | 5,156 | 1,790 | 1,157 | 999 | 474 | 475 | 220 | 41 | 21,550 | 5,278 | 1,009 | 989 | 866 | 748 | 712 | 761 | 193 | 31,905 |
| 19177 | Van Buren County, Iowa | 3,047 | 1,120 | 812 | 540 | 277 | 171 | 107 | 20 | 19,244 | 3,180 | 650 | 577 | 578 | 480 | 435 | 368 | 92 | 31,094 |
| 19179 | Wapello County, Iowa | 14,499 | 5,081 | 3,313 | 2,345 | 1,607 | 1,234 | 710 | 209 | 21,060 | 14,789 | 3,132 | 2,449 | 2,509 | 2,067 | 2,059 | 2,013 | 560 | 32,188 |
| 19181 | Warren County, Iowa | 12,782 | 2,438 | 2,148 | 2,354 | 2,217 | 2,243 | 1,128 | 254 | 32,452 | 14,709 | 1,380 | 1,628 | 1,616 | 1,856 | 2,654 | 4,204 | 1,371 | 50,349 |
| 19183 | Washington County, Iowa | 7,382 | 1,805 | 1,743 | 1,508 | 1,132 | 780 | 323 | 91 | 25,822 | 8,069 | 1,058 | 1,185 | 1,291 | 1,234 | 1,577 | 1,359 | 365 | 39,103 |
| 19185 | Wayne County, Iowa | 2,952 | 1,252 | 719 | 455 | 229 | 170 | 117 | 10 | 17,599 | 2,829 | 655 | 542 | 482 | 404 | 350 | 279 | 117 | 29,380 |
| 19187 | Webster County, Iowa | 15,884 | 4,716 | 3,666 | 3,040 | 2,048 | 1,373 | 867 | 174 | 23,692 | 15,862 | 2,807 | 2,595 | 2,448 | 2,268 | 2,339 | 2,656 | 749 | 35,334 |
| 19189 | Winnebago County, Iowa | 4,720 | 1,401 | 1,139 | 898 | 664 | 359 | 192 | 67 | 23,480 | 4,746 | 617 | 768 | 797 | 647 | 830 | 884 | 203 | 38,381 |
| 19191 | Winneshiek County, Iowa | 7,232 | 2,140 | 1,557 | 1,425 | 893 | 625 | 475 | 117 | 24,383 | 7,762 | 1,199 | 1,037 | 1,281 | 1,122 | 1,314 | 1,375 | 434 | 38,908 |
| 19193 | Woodbury County, Iowa | 36,979 | 10,553 | 7,799 | 6,529 | 4,870 | 3,972 | 2,300 | 956 | 25,186 | 39,256 | 5,941 | 5,818 | 5,985 | 5,208 | 5,994 | 7,526 | 2,784 | 38,509 |
| 19195 | Worth County, Iowa | 3,254 | 933 | 840 | 602 | 419 | 198 | 212 | 50 | 22,902 | 3,280 | 530 | 502 | 530 | 564 | 571 | 487 | 96 | 36,444 |
| 19197 | Wright County, Iowa | 5,885 | 1,740 | 1,268 | 1,167 | 817 | 497 | 296 | 100 | 24,582 | 5,972 | 1,002 | 915 | 944 | 868 | 1,034 | 948 | 261 | 36,197 |
| Source Data: 1990 and 2000 Census, U.S. Census Bureau | |||||||||||||||||||