Demographic Data Report for Iowa by County Population: Age 40 and over "All Races (includes Hispanic), Both Sexes" 2017-2021 American Community Survey 5-Year Data Sorted by Count County, FIPS,Value (Percent),People (Age 40 And Over),Rank within US "United States",00000,47.9,157871085,"N/A" "Iowa",19000,47.8,1518059,"31 of 52" "Polk County",19153,43.9,214394,"2805 of 3143" "Linn County",19113,47.4,108242,"2435 of 3143" "Scott County",19163,48.2,83889,"2311 of 3143" "Black Hawk County",19013,44.3,58183,"2779 of 3143" "Johnson County",19103,37.6,57140,"3075 of 3143" "Dubuque County",19061,48.2,47568,"2303 of 3143" "Woodbury County",19193,44.9,47217,"2716 of 3143" "Pottawattamie County",19155,49.3,46166,"2095 of 3143" "Dallas County",19049,42.1,40633,"2920 of 3143" "Story County",19169,34.3,33643,"3119 of 3143" "Warren County",19181,48.0,24884,"2336 of 3143" "Clinton County",19045,52.8,24580,"1267 of 3143" "Cerro Gordo County",19033,54.3,23466,"900 of 3143" "Des Moines County",19057,52.9,20663,"1239 of 3143" "Muscatine County",19139,47.5,20496,"2414 of 3143" "Marshall County",19127,48.2,19350,"2302 of 3143" "Jasper County",19099,51.1,19274,"1666 of 3143" "Lee County",19111,53.8,18156,"1016 of 3143" "Webster County",19187,48.8,18120,"2185 of 3143" "Wapello County",19179,49.4,17442,"2092 of 3143" "Marion County",19125,49.5,16516,"2067 of 3143" "Sioux County",19167,42.9,15294,"2872 of 3143" "Boone County",19015,52.6,14065,"1288 of 3143" "Benton County",19011,53.4,13688,"1117 of 3143" "Plymouth County",19149,50.5,12889,"1856 of 3143" "Bremer County",19017,48.6,12082,"2237 of 3143" "Washington County",19183,50.3,11320,"1904 of 3143" "Jones County",19105,54.1,11198,"941 of 3143" "Carroll County",19027,52.3,10854,"1376 of 3143" "Mahaska County",19123,48.5,10738,"2247 of 3143" "Jackson County",19097,54.0,10533,"968 of 3143" "Henry County",19087,50.8,10400,"1777 of 3143" "Winneshiek County",19191,51.6,10365,"1569 of 3143" "Fayette County",19065,52.9,10358,"1232 of 3143" "Dickinson County",19059,58.8,10316,"327 of 3143" "Buchanan County",19019,49.0,10084,"2161 of 3143" "Cedar County",19031,52.9,9781,"1240 of 3143" "Clayton County",19043,56.5,9698,"560 of 3143" "Delaware County",19055,54.5,9534,"871 of 3143" "Poweshiek County",19157,50.9,9481,"1736 of 3143" "Hardin County",19083,55.4,9410,"701 of 3143" "Buena Vista County",19021,44.4,9194,"2771 of 3143" "Iowa County",19095,53.7,8918,"1036 of 3143" "Tama County",19171,51.6,8811,"1561 of 3143" "Clay County",19041,51.4,8434,"1614 of 3143" "Page County",19145,55.1,8405,"751 of 3143" "Floyd County",19067,53.6,8401,"1058 of 3143" "Jefferson County",19101,52.9,8378,"1244 of 3143" "Madison County",19121,50.8,8334,"1773 of 3143" "Kossuth County",19109,54.4,8062,"887 of 3143" "Hamilton County",19079,53.2,8021,"1156 of 3143" "Butler County",19023,54.4,7841,"892 of 3143" "Mills County",19129,52.6,7713,"1296 of 3143" "Harrison County",19085,52.4,7644,"1356 of 3143" "Crawford County",19047,46.0,7616,"2588 of 3143" "Allamakee County",19005,54.0,7596,"974 of 3143" "Cass County",19029,56.0,7372,"621 of 3143" "O'Brien County",19141,50.9,7201,"1729 of 3143" "Wright County",19197,52.7,6841,"1279 of 3143" "Appanoose County",19007,53.7,6609,"1044 of 3143" "Cherokee County",19035,56.8,6593,"525 of 3143" "Grundy County",19075,53.0,6543,"1202 of 3143" "Chickasaw County",19037,53.4,6420,"1105 of 3143" "Shelby County",19165,54.2,6372,"928 of 3143" "Guthrie County",19077,56.9,6035,"515 of 3143" "Union County",19175,49.5,6032,"2068 of 3143" "Hancock County",19081,54.9,5952,"792 of 3143" "Louisa County",19115,52.7,5742,"1277 of 3143" "Lyon County",19119,47.6,5684,"2409 of 3143" "Mitchell County",19131,52.7,5552,"1271 of 3143" "Sac County",19161,56.1,5513,"614 of 3143" "Winnebago County",19189,51.3,5506,"1640 of 3143" "Franklin County",19069,54.3,5465,"898 of 3143" "Montgomery County",19137,52.5,5426,"1323 of 3143" "Keokuk County",19107,53.9,5413,"1010 of 3143" "Calhoun County",19025,53.0,5280,"1212 of 3143" "Humboldt County",19091,52.2,5018,"1415 of 3143" "Emmet County",19063,53.1,5005,"1195 of 3143" "Monona County",19133,55.7,4862,"663 of 3143" "Greene County",19073,54.7,4828,"842 of 3143" "Howard County",19089,50.4,4767,"1868 of 3143" "Palo Alto County",19147,52.3,4701,"1388 of 3143" "Lucas County",19117,53.9,4662,"995 of 3143" "Clarke County",19039,47.7,4644,"2389 of 3143" "Davis County",19051,45.2,4094,"2693 of 3143" "Worth County",19195,54.7,4074,"839 of 3143" "Van Buren County",19177,55.7,4010,"652 of 3143" "Adair County",19001,53.1,3947,"1196 of 3143" "Monroe County",19135,51.6,3913,"1574 of 3143" "Pocahontas County",19151,54.9,3891,"805 of 3143" "Fremont County",19071,56.1,3763,"605 of 3143" "Ida County",19093,51.5,3592,"1597 of 3143" "Decatur County",19053,45.8,3538,"2608 of 3143" "Wayne County",19185,51.6,3359,"1547 of 3143" "Osceola County",19143,54.3,3350,"907 of 3143" "Audubon County",19009,56.8,3211,"530 of 3143" "Taylor County",19173,53.7,3188,"1033 of 3143" "Ringgold County",19159,53.8,2548,"1028 of 3143" "Adams County",19003,55.9,2065,"639 of 3143" Created by statecancerprofiles.cancer.gov on 03/28/2024 11:59 am. Source: Demographic data provided by the Census Bureau (http://www.census.gov/) & the American Community Survey (http://www.census.gov/acs/www/). "For more information about Population: Age 40 and over, see the dictionary at http://statecancerprofiles.cancer.gov/dictionary.php#population." Data for United States does not include Puerto Rico.