3/27/95 IOWA Population of Counties by Decennial Census: 1900 to 1990 Compiled and edited by Richard L. Forstall Population Division US Bureau of the Census Washington, DC 20233 Please see file, 1900-90.doc for explanatory notes and documentation. FIPS 1990 1980 1970 1960 00000 248709873 226545805 203211926 179323175 United States 19000 2776755 2913808 2824376 2757537 Iowa 19001 8409 9509 9487 10893 Adair County 19003 4866 5731 6322 7468 Adams County 19005 13855 15108 14968 15982 Allamakee County 19007 13743 15511 15007 16015 Appanoose County 19009 7334 8559 9595 10919 Audubon County 19011 22429 23649 22885 23422 Benton County 19013 123798 137961 132916 122482 Black Hawk County 19015 25186 26184 26470 28037 Boone County 19017 22813 24820 22737 21108 Bremer County 19019 20844 22900 21746 22293 Buchanan County 19021 19965 20774 20693 21189 Buena Vista County 19023 15731 17668 16953 17467 Butler County 19025 11508 13542 14287 15923 Calhoun County 19027 21423 22951 22912 23431 Carroll County 19029 15128 16932 17007 17919 Cass County 19031 17381 18635 17655 17791 Cedar County 19033 46733 48458 49335 49894 Cerro Gordo County 19035 14098 16238 17269 18598 Cherokee County 19037 13295 15437 14969 15034 Chickasaw County 19039 8287 8612 7581 8222 Clarke County 19041 17585 19576 18464 18504 Clay County 19043 19054 21098 20606 21962 Clayton County 19045 51040 57122 56749 55060 Clinton County 19047 16775 18935 18780 18569 Crawford County 19049 29755 29513 26085 24123 Dallas County 19051 8312 9104 8207 9199 Davis County 19053 8338 9794 9737 10539 Decatur County 19055 18035 18933 18770 18483 Delaware County 19057 42614 46203 46982 44605 Des Moines County 19059 14909 15629 12565 12574 Dickinson County 19061 86403 93745 90609 80048 Dubuque County 19063 11569 13336 14009 14871 Emmet County 19065 21843 25488 26898 28581 Fayette County 19067 17058 19597 19860 21102 Floyd County 19069 11364 13036 13255 15472 Franklin County 19071 8226 9401 9282 10282 Fremont County 19073 10045 12119 12716 14379 Greene County 19075 12029 14366 14119 14132 Grundy County 19077 10935 11983 12243 13607 Guthrie County 19079 16071 17862 18383 20032 Hamilton County 19081 12638 13833 13227 14604 Hancock County 19083 19094 21776 22248 22533 Hardin County 19085 14730 16348 16240 17600 Harrison County 19087 19226 18890 18114 18187 Henry County 19089 9809 11114 11442 12734 Howard County 19091 10756 12246 12519 13156 Humboldt County 19093 8365 8908 9190 10269 Ida County 19095 14630 15429 15419 16396 Iowa County 19097 19950 22503 20839 20754 Jackson County 19099 34795 36425 35425 35282 Jasper County 19101 16310 16316 15774 15818 Jefferson County 19103 96119 81717 72127 53663 Johnson County 19105 19444 20401 19868 20693 Jones County 19107 11624 12921 13943 15492 Keokuk County 19109 18591 21891 22937 25314 Kossuth County 19111 38687 43106 42996 44207 Lee County 19113 168767 169775 163213 136899 Linn County 19115 11592 12055 10682 10290 Louisa County 19117 9070 10313 10163 10923 Lucas County 19119 11952 12896 13340 14468 Lyon County 19121 12483 12597 11558 12295 Madison County 19123 21522 22867 22177 23602 Mahaska County 19125 30001 29669 26352 25886 Marion County 19127 38276 41652 41076 37984 Marshall County 19129 13202 13406 11606 13050 Mills County 19131 10928 12329 13108 14043 Mitchell County 19133 10034 11692 12069 13916 Monona County 19135 8114 9209 9357 10463 Monroe County 19137 12076 13413 12781 14467 Montgomery County 19139 39907 40436 37181 33840 Muscatine County 19141 15444 16972 17522 18840 O'Brien County 19143 7267 8371 8555 10064 Osceola County 19145 16870 19063 18507 21023 Page County 19147 10669 12721 13289 14736 Palo Alto County 19149 23388 24743 24312 23906 Plymouth County 19151 9525 11369 12729 14234 Pocahontas County 19153 327140 303170 286101 266315 Polk County 19155 82628 86561 86991 83102 Pottawattami County 19157 19033 19306 18803 19300 Poweshiek County 19159 5420 6112 6373 7910 Ringgold County 19161 12324 14118 15573 17007 Sac County 19163 150979 160022 142687 119067 Scott County 19165 13230 15043 15528 15825 Shelby County 19167 29903 30813 27996 26375 Sioux County 19169 74252 72326 62783 49327 Story County 19171 17419 19533 20147 21413 Tama County 19173 7114 8353 8790 10288 Taylor County 19175 12750 13858 13557 13712 Union County 19177 7676 8626 8643 9778 Van Buren County 19179 35687 40241 42149 46126 Wapello County 19181 36033 34878 27432 20829 Warren County 19183 19612 20141 18967 19406 Washington County 19185 7067 8199 8405 9800 Wayne County 19187 40342 45953 48391 47810 Webster County 19189 12122 13010 12990 13099 Winnebago County 19191 20847 21876 21758 21651 Winneshiek County 19193 98276 100884 103052 107849 Woodbury County 19195 7991 9075 8968 10259 Worth County 19197 14269 16319 17294 19447 Wright County FIPS 1950 1940 1930 1920 00000 151325798 132164569 123202624 106021537 United States 19000 2621073 2538268 2470939 2404021 Iowa 19001 12292 13196 13891 14259 Adair County 19003 8753 10156 10437 10521 Adams County 19005 16351 17184 16328 17285 Allamakee County 19007 19683 24245 24835 30535 Appanoose County 19009 11579 11790 12264 12520 Audubon County 19011 22656 22879 22851 24080 Benton County 19013 100448 79946 69146 56570 Black Hawk County 19015 28139 29782 29271 29892 Boone County 19017 18884 17932 17046 16728 Bremer County 19019 21927 20991 19550 19890 Buchanan County 19021 21113 19838 18667 18556 Buena Vista County 19023 17394 17986 17617 17845 Butler County 19025 16925 17584 17605 17783 Calhoun County 19027 23065 22770 22326 21549 Carroll County 19029 18532 18647 19422 19421 Cass County 19031 16910 16884 16760 17560 Cedar County 19033 46053 43845 38476 34675 Cerro Gordo County 19035 19052 19258 18737 17760 Cherokee County 19037 15228 15227 14637 15431 Chickasaw County 19039 9369 10233 10384 10506 Clarke County 19041 18103 17762 16107 15660 Clay County 19043 22522 24334 24559 25032 Clayton County 19045 49664 44722 44377 43371 Clinton County 19047 19741 20538 21028 20614 Crawford County 19049 23661 24649 25493 25120 Dallas County 19051 9959 11136 11150 12574 Davis County 19053 12601 14012 14903 16566 Decatur County 19055 17734 18487 18122 18183 Delaware County 19057 42056 36804 38162 35520 Des Moines County 19059 12756 12185 10982 10241 Dickinson County 19061 71337 63768 61214 58262 Dubuque County 19063 14102 13406 12856 12627 Emmet County 19065 28294 29151 29145 29251 Fayette County 19067 21505 20169 19524 18860 Floyd County 19069 16268 16379 16382 15807 Franklin County 19071 12323 14645 15533 15447 Fremont County 19073 15544 16599 16528 16467 Greene County 19075 13722 13518 14133 14420 Grundy County 19077 15197 17210 17324 17596 Guthrie County 19079 19660 19922 20978 19531 Hamilton County 19081 15077 15402 14802 14723 Hancock County 19083 22218 22530 22947 23337 Hardin County 19085 19560 22767 24897 24488 Harrison County 19087 18708 17994 17660 18298 Henry County 19089 13105 13531 13082 13705 Howard County 19091 13117 13459 13202 12951 Humboldt County 19093 10697 11047 11933 11689 Ida County 19095 15835 17016 17332 18600 Iowa County 19097 18622 19181 18481 19931 Jackson County 19099 32305 31496 32936 27855 Jasper County 19101 15696 15762 16241 16440 Jefferson County 19103 45756 33191 30276 26462 Johnson County 19105 19401 19950 19206 18607 Jones County 19107 16797 18406 19148 20983 Keokuk County 19109 26241 26630 25452 25082 Kossuth County 19111 43102 41074 41268 39676 Lee County 19113 104274 89142 82336 74004 Linn County 19115 11101 11384 11575 12179 Louisa County 19117 12069 14571 15114 15686 Lucas County 19119 14697 15374 15293 15431 Lyon County 19121 13131 14525 14331 15020 Madison County 19123 24672 26485 25804 26270 Mahaska County 19125 25930 27019 25727 24957 Marion County 19127 35611 35406 33727 32630 Marshall County 19129 14064 15064 15866 15422 Mills County 19131 13945 14121 14065 13921 Mitchell County 19133 16303 18238 18213 17125 Monona County 19135 11814 14553 15010 23467 Monroe County 19137 15685 15697 16752 17048 Montgomery County 19139 32148 31296 29385 29042 Muscatine County 19141 18970 19293 18409 19051 O'Brien County 19143 10181 10607 10182 10223 Osceola County 19145 23921 24887 25904 24137 Page County 19147 15891 16170 15398 15486 Palo Alto County 19149 23252 23502 24159 23584 Plymouth County 19151 15496 16266 15687 15602 Pocahontas County 19153 226010 195835 172837 154029 Polk County 19155 69682 66756 69888 61550 Pottawattami County 19157 19344 18758 18727 19910 Poweshiek County 19159 9528 11137 11966 12919 Ringgold County 19161 17518 17639 17641 17500 Sac County 19163 100698 84748 77332 73952 Scott County 19165 15942 16720 17131 16065 Shelby County 19167 26381 27209 26806 26458 Sioux County 19169 44294 33434 31141 26185 Story County 19171 21688 22428 21987 21861 Tama County 19173 12420 14258 14859 15514 Taylor County 19175 15651 16280 17435 17268 Union County 19177 11007 12053 12603 14060 Van Buren County 19179 47397 44280 40480 37937 Wapello County 19181 17758 17695 17700 18047 Warren County 19183 19557 20055 19822 20421 Washington County 19185 11737 13308 13787 15378 Wayne County 19187 44241 41521 40425 37611 Webster County 19189 13450 13972 13143 13489 Winnebago County 19191 21639 22263 21630 22091 Winneshiek County 19193 103917 103627 101669 92171 Woodbury County 19195 11068 11449 11164 11630 Worth County 19197 19652 20038 20216 20348 Wright County FIPS 1910 1900 00000 92228496 76212168 United States 19000 2224771 2231853 Iowa 19001 14420 16192 Adair County 19003 10998 13601 Adams County 19005 17328 18711 Allamakee County 19007 28701 25927 Appanoose County 19009 12671 13626 Audubon County 19011 23156 25177 Benton County 19013 44865 32399 Black Hawk County 19015 27626 28200 Boone County 19017 15843 16305 Bremer County 19019 19748 21427 Buchanan County 19021 15981 16975 Buena Vista County 19023 17119 17955 Butler County 19025 17090 18569 Calhoun County 19027 20117 20319 Carroll County 19029 19047 21274 Cass County 19031 17765 19371 Cedar County 19033 25011 20672 Cerro Gordo County 19035 16741 16570 Cherokee County 19037 15375 17037 Chickasaw County 19039 10736 12440 Clarke County 19041 12766 13401 Clay County 19043 25576 27750 Clayton County 19045 45394 43832 Clinton County 19047 20041 21685 Crawford County 19049 23628 23058 Dallas County 19051 13315 15620 Davis County 19053 16347 18115 Decatur County 19055 17888 19185 Delaware County 19057 36145 35989 Des Moines County 19059 8137 7995 Dickinson County 19061 57450 56403 Dubuque County 19063 9816 9936 Emmet County 19065 27919 29845 Fayette County 19067 17119 17754 Floyd County 19069 14780 14996 Franklin County 19071 15623 18546 Fremont County 19073 16023 17820 Greene County 19075 13574 13757 Grundy County 19077 17374 18729 Guthrie County 19079 19242 19514 Hamilton County 19081 12731 13752 Hancock County 19083 20921 22794 Hardin County 19085 23162 25597 Harrison County 19087 18640 20022 Henry County 19089 12920 14512 Howard County 19091 12182 12667 Humboldt County 19093 11296 12327 Ida County 19095 18409 19544 Iowa County 19097 21258 23615 Jackson County 19099 27034 26976 Jasper County 19101 15951 17437 Jefferson County 19103 25914 24817 Johnson County 19105 19050 21954 Jones County 19107 21160 24979 Keokuk County 19109 21971 22720 Kossuth County 19111 36702 39719 Lee County 19113 60720 55392 Linn County 19115 12855 13516 Louisa County 19117 13462 16126 Lucas County 19119 14624 13165 Lyon County 19121 15621 17710 Madison County 19123 29860 34273 Mahaska County 19125 22995 24159 Marion County 19127 30279 29991 Marshall County 19129 15811 16764 Mills County 19131 13435 14916 Mitchell County 19133 16633 17980 Monona County 19135 25429 17985 Monroe County 19137 16604 17803 Montgomery County 19139 29505 28242 Muscatine County 19141 17262 16985 O'Brien County 19143 8956 8725 Osceola County 19145 24002 24187 Page County 19147 13845 14354 Palo Alto County 19149 23129 22209 Plymouth County 19151 14808 15339 Pocahontas County 19153 110438 82624 Polk County 19155 55832 54336 Pottawattami County 19157 19589 19414 Poweshiek County 19159 12904 15325 Ringgold County 19161 16555 17639 Sac County 19163 60000 51558 Scott County 19165 16552 17932 Shelby County 19167 25248 23337 Sioux County 19169 24083 23159 Story County 19171 22156 24585 Tama County 19173 16312 18784 Taylor County 19175 16616 19928 Union County 19177 15020 17354 Van Buren County 19179 37743 35426 Wapello County 19181 18194 20376 Warren County 19183 19925 20718 Washington County 19185 16184 17491 Wayne County 19187 34629 31757 Webster County 19189 11914 12725 Winnebago County 19191 21729 23731 Winneshiek County 19193 67616 54610 Woodbury County 19195 9950 10887 Worth County 19197 17951 18227 Wright County