Regional Economics & Community Analysis Program

Historical census population

Table ID: POP-3
Unit of measure: Number of persons
Vintage: 1850-2000 *

* The most recent 50 years are displayed. All data years are available for download below.

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County IDArea Name195019601970198019902000
19000Iowa2,621,0732,757,5372,825,3682,913,8082,776,7552,926,324
19001Adair County12,29210,8939,4879,5098,4098,243
19003Adams County8,7537,4686,3225,7314,8664,482
19005Allamakee County16,35115,98214,96815,10813,85514,675
19007Appanoose County19,68316,01515,00715,51113,74313,721
19009Audubon County11,57910,9199,5958,5597,3346,830
19011Benton County22,65623,42222,88523,64922,42925,308
19013Black Hawk County100,448122,482132,916137,961123,798128,012
19015Boone County28,13928,03726,47026,18425,18626,224
19017Bremer County18,88421,10822,73724,82022,81323,325
19019Buchanan County21,92722,29321,76222,90020,84421,093
19021Buena Vista County21,11321,18920,69320,77419,96520,411
19023Butler County17,39417,46716,95317,66815,73115,305
19025Calhoun County16,92515,92314,29213,54211,50811,115
19027Carroll County23,06523,43122,91222,95121,42321,421
19029Cass County18,53217,91917,00716,93215,12814,684
19031Cedar County16,91017,79117,65518,63517,38118,187
19033Cerro Gordo County46,05349,89449,22348,45846,73346,447
19035Cherokee County19,05218,59817,26916,23814,09813,035
19037Chickasaw County15,22815,03414,96915,43713,29513,095
19039Clarke County9,3698,2227,5818,6128,2879,133
19041Clay County18,10318,50418,46419,57617,58517,372
19043Clayton County22,52221,96220,60621,09819,05418,678
19045Clinton County49,66455,06056,74957,12251,04050,149
19047Crawford County19,74118,56919,11618,93516,77516,942
19049Dallas County23,66124,12326,08529,51329,75540,750
19051Davis County9,9599,1998,2079,1048,3128,541
19053Decatur County12,60110,5399,7379,7948,3388,689
19055Delaware County17,73418,48318,77018,93318,03518,404
19057Des Moines County42,05644,60546,98246,20342,61442,351
19059Dickinson County12,75612,57412,56515,62914,90916,424
19061Dubuque County71,33780,04890,60993,74586,40389,143
19063Emmet County14,10214,87114,00913,33611,56911,027
19065Fayette County28,29428,58126,89825,48821,84322,008
19067Floyd County21,50521,10219,86019,59717,05816,900
19069Franklin County16,26815,47213,25513,03611,36410,704
19071Fremont County12,32310,2829,2829,4018,2268,010
19073Greene County15,54414,37912,71612,11910,04510,366
19075Grundy County13,72214,13214,11914,36612,02912,369
19077Guthrie County15,19713,60712,24311,98310,93511,353
19079Hamilton County19,66020,03218,38317,86216,07116,438
19081Hancock County15,07714,60413,50613,83312,63812,100
19083Hardin County22,21822,53322,24821,77619,09418,812
19085Harrison County19,56017,60016,24016,34814,73015,666
19087Henry County18,70818,18718,11418,89019,22620,336
19089Howard County13,10512,73411,44211,1149,8099,932
19091Humboldt County13,11713,15612,51912,24610,75610,381
19093Ida County10,69710,2699,2838,9088,3657,837
19095Iowa County15,83516,39615,41915,42914,63015,671
19097Jackson County18,62220,75420,83922,50319,95020,296
19099Jasper County32,30535,28235,42536,42534,79537,213
19101Jefferson County15,69615,81815,77416,31616,31016,181
19103Johnson County45,75653,66372,12781,71796,119111,006
19105Jones County19,40120,69319,86820,40119,44420,221
19107Keokuk County16,79715,49213,94312,92111,62411,400
19109Kossuth County26,24125,31422,93721,89118,59117,163
19111Lee County43,10244,20742,99643,10638,68738,052
19113Linn County104,274136,899163,213169,775168,767191,701
19115Louisa County11,10110,29010,68212,05511,59212,183
19117Lucas County12,06910,92310,16310,3139,0709,422
19119Lyon County14,69714,46813,34012,89611,95211,763
19121Madison County13,13112,29511,55812,59712,48314,019
19123Mahaska County24,67223,60222,17722,86721,52222,335
19125Marion County25,93025,88626,35229,66930,00132,052
19127Marshall County35,61137,98441,07641,65238,27639,311
19129Mills County14,06413,05011,83213,40613,20214,547
19131Mitchell County13,94514,04313,10812,32910,92810,874
19133Monona County16,30313,91612,06911,69210,03410,020
19135Monroe County11,81410,4639,3579,2098,1148,016
19137Montgomery County15,68514,46712,78113,41312,07611,771
19139Muscatine County32,14833,84037,18140,43639,90741,722
19141O'Brien County18,97018,84017,52216,97215,44415,102
19143Osceola County10,18110,0648,5558,3717,2677,003
19145Page County23,92121,02318,53719,06316,87016,976
19147Palo Alto County15,89114,73613,28912,72110,66910,147
19149Plymouth County23,25223,90624,32224,74323,38824,849
19151Pocahontas County15,49614,23412,79311,3699,5258,662
19153Polk County226,010266,315286,130303,170327,140374,601
19155Pottawattamie County69,68283,10286,99186,56182,62887,704
19157Poweshiek County19,34419,30018,80319,30619,03318,815
19159Ringgold County9,5287,9106,3736,1125,4205,469
19161Sac County17,51817,00715,57314,11812,32411,529
19163Scott County100,698119,067142,687160,022150,979158,668
19165Shelby County15,94215,82515,52815,04313,23013,173
19167Sioux County26,38126,37527,99630,81329,90331,589
19169Story County44,29449,32762,78372,32674,25279,981
19171Tama County21,68821,41320,14719,53317,41918,103
19173Taylor County12,42010,2888,7908,3537,1146,958
19175Union County15,65113,71213,55713,85812,75012,309
19177Van Buren County11,0079,7788,6438,6267,6767,809
19179Wapello County47,39746,12642,14940,24135,68736,051
19181Warren County17,75820,82927,43234,87836,03340,671
19183Washington County19,55719,40618,96720,14119,61220,670
19185Wayne County11,7379,8008,4058,1997,0676,730
19187Webster County44,24147,81048,39145,95340,34240,235
19189Winnebago County13,45013,09912,99013,01012,12211,723
19191Winneshiek County21,63921,65121,75821,87620,84721,310
19193Woodbury County103,917107,849103,052100,88498,276103,877
19195Worth County11,06810,2598,9849,0757,9917,909
19197Wright County19,65219,44717,29416,31914,26914,334

Release Date: May 2004
Source: Census 2000 Summary File 1, Census 1990 Summary File 1, and historical decennial census data from U.S. Census Bureau.
Notes: Data for 1850 through 1980 obtained via the State Data Center of Iowa, compiled from (1) Population of Counties by Decennial Census: 1900 to 1990, Richard L. Forstall, Population Division, and (2) the Eleventh Census of the United States.