(CO-2000-4) County Population Estimates for April 1, 2000 and Demographic Components of Population Change: April 1, 1990 Census to April 1, 2000 Estimate The 4/1/1990 Census figure shown in this table is the population estimates base. It is an update of the 4/1/1990 Census figure shown in previous Census Bureau reports and reflects the governmental unit boundaries legally effective as of January 1, 2000, including any post-1990 corrections and other changes due to annexations, new incorporations, or mergers. The 4/1/2000 Estimates were created without knowledge of the Census 2000 results. The 4/1/2000 Census figure is included in this table for comparative purposes. Source: Population Estimates Program, Population Division, U.S. Census Bureau, Washington, DC 20233 Contact: Statistical Information Staff, Population Division, U.S. Census Bureau (301-763-2422 or pop@census.gov) Internet Release Date: November 1, 2005 ------4/1/1990 Census to 4/1/2000 Estimate------ Net Net 4/1/2000 4/1/2000 4/1/1990 International Domestic FIPS State/County Code and Area Name Census Estimate Census Births Deaths Migration Migration 19 Iowa.............................. 2,926,324 2,875,648 2,776,831 377,519 278,335 24,653 -19,157 19001 Adair County, IA.................. 8,243 8,017 8,409 819 1,135 4 -42 19003 Adams County, IA.................. 4,482 4,354 4,866 476 623 5 -346 19005 Allamakee County, IA.............. 14,675 14,009 13,855 1,724 1,750 126 108 19007 Appanoose County, IA.............. 13,721 13,482 13,743 1,589 1,850 21 39 19009 Audubon County, IA................ 6,830 6,712 7,334 753 964 5 -382 19011 Benton County, IA................. 25,308 26,067 22,429 3,065 2,135 15 2,485 19013 Black Hawk County, IA............. 128,012 119,912 123,798 16,574 11,684 762 -9,192 19015 Boone County, IA.................. 26,224 26,441 25,186 2,995 3,025 48 1,321 19017 Bremer County, IA................. 23,325 23,339 22,813 2,398 2,322 8 540 19019 Buchanan County, IA............... 21,093 21,208 20,844 3,013 2,131 45 -479 19021 Buena Vista County, IA............ 20,411 19,351 19,965 2,494 2,125 371 -1,278 19023 Butler County, IA................. 15,305 15,606 15,731 1,659 1,889 12 155 19025 Calhoun County, IA................ 11,115 11,214 11,508 1,096 1,681 12 340 19027 Carroll County, IA................ 21,421 21,308 21,423 2,680 2,385 31 -365 19029 Cass County, IA................... 14,684 14,492 15,128 1,646 1,924 32 -337 19031 Cedar County, IA.................. 18,187 18,031 17,444 1,993 1,749 32 385 19033 Cerro Gordo County, IA............ 46,447 45,393 46,733 5,854 5,132 118 -2,049 19035 Cherokee County, IA............... 13,035 12,999 14,098 1,440 1,671 -0 -825 19037 Chickasaw County, IA.............. 13,095 13,308 13,295 1,555 1,456 31 -60 19039 Clarke County, IA................. 9,133 8,457 8,287 940 1,010 4 262 19041 Clay County, IA................... 17,372 17,280 17,585 2,119 1,798 31 -599 19043 Clayton County, IA................ 18,678 18,453 19,054 2,165 2,234 22 -486 19045 Clinton County, IA................ 50,149 49,424 51,040 6,579 5,465 149 -2,708 19047 Crawford County, IA............... 16,942 16,390 16,775 2,021 1,696 141 -792 19049 Dallas County, IA................. 40,750 39,119 29,755 4,680 2,952 316 6,747 19051 Davis County, IA.................. 8,541 8,489 8,312 1,157 1,016 7 63 19053 Decatur County, IA................ 8,689 8,312 8,338 952 1,136 10 170 19055 Delaware County, IA............... 18,404 18,492 18,035 2,484 1,548 8 -407 19057 Des Moines County, IA............. 42,351 41,634 42,614 5,526 4,407 64 -2,011 19059 Dickinson County, IA.............. 16,424 16,387 14,909 1,545 1,763 42 1,701 19061 Dubuque County, IA................ 89,143 88,040 86,403 11,961 8,468 204 -2,115 19063 Emmet County, IA.................. 11,027 10,563 11,569 1,278 1,385 46 -897 19065 Fayette County, IA................ 22,008 21,535 21,843 2,678 2,571 44 -378 19067 Floyd County, IA.................. 16,900 16,132 17,058 2,030 2,098 45 -834 19069 Franklin County, IA............... 10,704 10,687 11,364 1,248 1,371 51 -554 19071 Fremont County, IA................ 8,010 7,758 8,226 907 1,197 12 -151 19073 Greene County, IA................. 10,366 9,929 10,045 1,165 1,365 22 109 19075 Grundy County, IA................. 12,369 12,318 12,029 1,267 1,293 7 357 19077 Guthrie County, IA................ 11,353 11,561 10,935 1,267 1,405 13 789 19079 Hamilton County, IA............... 16,438 15,975 16,071 2,072 1,749 43 -403 19081 Hancock County, IA................ 12,100 12,061 12,638 1,351 1,275 31 -639 19083 Hardin County, IA................. 18,812 18,144 19,094 2,105 2,544 14 -469 19085 Harrison County, IA............... 15,666 15,374 14,730 1,815 2,025 7 909 19087 Henry County, IA.................. 20,336 20,056 19,226 2,494 1,981 96 289 19089 Howard County, IA................. 9,932 9,560 9,809 1,142 1,312 17 -51 19091 Humboldt County, IA............... 10,381 10,234 10,756 1,132 1,274 21 -354 19093 Ida County, IA.................... 7,837 7,825 8,365 934 1,092 22 -377 19095 Iowa County, IA................... 15,671 15,725 14,630 1,961 1,673 30 826 19097 Jackson County, IA................ 20,296 20,190 19,950 2,501 2,246 10 -38 19099 Jasper County, IA................. 37,213 36,787 34,795 4,371 3,551 29 1,280 19101 Jefferson County, IA.............. 16,181 16,783 16,310 1,732 1,587 417 -48 19103 Johnson County, IA................ 111,006 104,590 96,119 13,103 4,727 1,574 -1,205 19105 Jones County, IA.................. 20,221 19,909 19,444 2,249 1,785 24 46 19107 Keokuk County, IA................. 11,400 11,475 11,624 1,426 1,394 21 -145 19109 Kossuth County, IA................ 17,163 17,632 18,591 1,932 2,120 37 -720 19111 Lee County, IA.................... 38,052 37,976 38,687 4,817 4,452 65 -1,020 19113 Linn County, IA................... 191,701 186,194 168,767 26,046 13,329 1,245 3,118 19115 Louisa County, IA................. 12,183 11,957 11,592 1,673 1,179 251 -328 19117 Lucas County, IA.................. 9,422 9,025 9,070 1,121 1,202 21 67 19119 Lyon County, IA................... 11,763 11,974 11,952 1,568 1,240 -14 -247 19121 Madison County, IA................ 14,019 14,237 12,483 1,611 1,620 12 1,795 19123 Mahaska County, IA................ 22,335 21,907 21,532 2,772 2,229 87 -170 19125 Marion County, IA................. 32,052 31,775 30,001 3,865 3,282 73 1,220 19127 Marshall County, IA............... 39,311 38,664 38,276 5,018 5,034 537 65 19129 Mills County, IA.................. 14,547 14,831 13,202 1,688 1,288 15 1,246 19131 Mitchell County, IA............... 10,874 11,061 10,928 1,346 1,456 8 294 19133 Monona County, IA................. 10,020 10,050 10,034 1,168 1,623 17 378 19135 Monroe County, IA................. 8,016 7,953 8,114 986 1,047 8 -63 19137 Montgomery County, IA............. 11,771 11,717 12,076 1,467 1,754 15 -29 19139 Muscatine County, IA.............. 41,722 41,219 39,907 6,272 3,746 746 -1,850 19141 O'Brien County, IA................ 15,102 14,417 15,444 1,862 1,920 22 -956 19143 Osceola County, IA................ 7,003 6,850 7,267 845 837 8 -407 19145 Page County, IA................... 16,976 16,923 16,870 1,808 2,311 38 576 19147 Palo Alto County, IA.............. 10,147 9,905 10,669 1,076 1,413 3 -397 19149 Plymouth County, IA............... 24,849 24,856 23,388 3,146 2,372 58 496 19151 Pocahontas County, IA............. 8,662 8,621 9,525 858 1,227 16 -514 19153 Polk County, IA................... 374,601 367,930 327,140 56,218 26,784 9,832 1,753 19155 Pottawattamie County, IA.......... 87,704 87,219 82,628 12,102 7,917 369 333 19157 Poweshiek County, IA.............. 18,815 18,749 19,033 2,084 2,062 40 -263 19159 Ringgold County, IA............... 5,469 5,356 5,420 487 809 2 288 19161 Sac County, IA.................... 11,529 11,579 12,324 1,340 1,636 19 -427 19163 Scott County, IA.................. 158,668 159,441 150,973 23,311 12,539 1,824 -3,902 19165 Shelby County, IA................. 13,173 12,792 13,230 1,490 1,613 13 -276 19167 Sioux County, IA.................. 31,589 31,349 29,903 4,140 2,400 82 -281 19169 Story County, IA.................. 79,981 75,971 74,252 8,660 4,345 991 -3,373 19171 Tama County, IA................... 18,103 17,730 17,419 2,275 2,091 123 78 19173 Taylor County, IA................. 6,958 7,099 7,114 746 1,033 40 254 19175 Union County, IA.................. 12,309 12,535 12,750 1,461 1,636 25 -8 19177 Van Buren County, IA.............. 7,809 7,935 7,676 949 1,019 8 350 19179 Wapello County, IA................ 36,051 35,364 35,696 4,365 4,538 94 -114 19181 Warren County, IA................. 40,671 41,071 36,033 5,041 2,972 87 3,018 19183 Washington County, IA............. 20,670 21,191 19,612 2,858 2,306 179 962 19185 Wayne County, IA.................. 6,730 6,547 7,067 671 1,104 8 -54 19187 Webster County, IA................ 40,235 39,416 40,342 5,354 4,863 102 -1,400 19189 Winnebago County, IA.............. 11,723 11,965 12,122 1,354 1,448 21 -35 19191 Winneshiek County, IA............. 21,310 20,981 20,847 2,298 1,810 90 -349 19193 Woodbury County, IA............... 103,877 101,340 98,276 16,650 9,745 2,142 -5,868 19195 Worth County, IA.................. 7,909 7,693 7,991 906 1,049 2 -111 19197 Wright County, IA................. 14,334 13,760 14,269 1,635 1,912 17 -189