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    Jan 1990    
 
 
    Dec 2018
Persons
Name Dec 2018 Nov 2018 Dec 2017
Adair County
4,194 4,226 4,116
Adams County
2,124 2,114 2,086
Allamakee County
7,518 7,433 7,425
Appanoose County
5,990 6,062 5,899
Audubon County
3,051 3,054 3,085
Benton County
13,507 13,512 13,363
Black Hawk County
67,636 67,785 67,459
Boone County
14,812 14,866 14,701
Bremer County
13,557 13,622 13,484
Buchanan County
11,014 10,910 10,917
Buena Vista County
11,683 11,791 11,448
Butler County
7,791 7,757 7,770
Calhoun County
4,254 4,279 4,203
Carroll County
10,956 10,850 10,863
Cass County
6,999 6,942 6,981
Cedar County
10,849 10,881 10,735
Cerro Gordo County
23,404 23,420 22,982
Cherokee County
6,060 6,050 5,991
Chickasaw County
6,501 6,498 6,388
Clarke County
4,861 4,798 4,706
Clay County
8,500 8,454 8,603
Clayton County
10,214 10,127 10,037
Clinton County
22,781 22,878 22,863
Crawford County
7,990 7,903 8,054
Dallas County
47,325 47,332 45,704
Davis County
4,240 4,230 4,178
Decatur County
4,437 4,373 4,386
Delaware County
10,485 10,439 10,439
Des Moines County
18,959 19,112 19,236
Dickinson County
9,694 9,665 9,741
Dubuque County
54,381 54,398 54,324
Emmet County
5,311 5,315 5,404
Fayette County
10,425 10,401 10,408
Floyd County
8,938 8,893 8,768
Franklin County
5,766 5,768 5,702
Fremont County
3,763 3,774 3,751
Greene County
5,462 5,456 5,310
Grundy County
6,498 6,500 6,444
Guthrie County
5,732 5,689 5,547
Hamilton County
7,061 7,096 7,012
Hancock County
6,131 6,149 6,034
Hardin County
8,378 8,336 8,365
Harrison County
7,478 7,445 7,314
Henry County
9,923 9,939 9,729
Howard County
5,163 5,046 5,073
Humboldt County
5,292 5,291 5,203
Ida County
4,155 4,129 4,025
Iowa County
10,841 10,790 10,575
Jackson County
10,895 10,843 10,790
Jasper County
19,315 19,331 19,074
Jefferson County
9,026 8,860 8,943
Johnson County
85,001 85,901 83,970
Jones County
10,569 10,480 10,443
Keokuk County
5,155 5,098 5,142
Kossuth County
8,653 8,618 8,516
Lee County
16,023 15,947 15,897
Linn County
118,551 118,571 117,657
Louisa County
6,048 6,046 5,946
Lucas County
4,285 4,276 4,301
Lyon County
7,034 6,958 6,902
Madison County
8,562 8,490 8,210
Mahaska County
11,413 11,404 11,328
Marion County
17,650 17,633 17,237
Marshall County
18,006 17,773 18,104
Mills County
7,408 7,414 7,261
Mitchell County
5,862 5,859 5,611
Monona County
4,415 4,392 4,397
Monroe County
3,877 3,841 3,825
Montgomery County
4,991 4,939 4,923
Muscatine County
21,370 21,441 21,320
O'Brien County
8,078 8,007 7,963
Osceola County
3,573 3,558 3,494
Page County
6,082 6,066 6,127
Palo Alto County
4,979 4,991 4,867
Plymouth County
14,739 14,714 14,478
Pocahontas County
4,177 4,247 4,093
Polk County
266,334 266,202 257,488
Pottawattamie County
48,735 48,706 47,731
Poweshiek County
10,298 10,519 10,258
Ringgold County
2,571 2,552 2,559
Sac County
5,296 5,333 5,274
Scott County
86,960 86,872 85,824
Shelby County
6,608 6,591 6,552
Sioux County
20,695 20,604 20,346
Story County
59,248 60,254 58,060
Tama County
9,798 9,694 9,641
Taylor County
3,293 3,263 3,253
Union County
6,468 6,411 6,406
Van Buren County
3,648 3,608 3,646
Wapello County
17,390 17,415 17,453
Warren County
28,022 27,976 27,124
Washington County
12,405 12,457 12,242
Wayne County
2,798 2,789 2,792
Webster County
19,368 19,406 19,027
Winneshiek County
11,833 11,889 11,728
Winnebago County
5,107 5,117 5,058
Woodbury County
54,544 54,608 53,769
Worth County
4,235 4,214 4,160
Wright County
6,377 6,384 6,381
   

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