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    Jan 1990    
 
 
    May 2019
Persons
Name May 2019 Apr 2019 May 2018
Adair County
4,143 4,081 4,142
Adams County
2,131 2,114 2,108
Allamakee County
7,424 7,377 7,403
Appanoose County
5,933 5,918 5,910
Audubon County
3,157 3,108 3,092
Benton County
13,363 13,437 13,277
Black Hawk County
69,983 70,654 68,852
Boone County
15,002 15,013 14,798
Bremer County
14,007 14,046 13,866
Buchanan County
10,950 11,000 11,206
Buena Vista County
11,482 11,291 11,608
Butler County
7,832 7,808 7,877
Calhoun County
4,313 4,229 4,378
Carroll County
10,762 10,670 10,783
Cass County
7,069 7,051 7,257
Cedar County
10,832 10,825 10,763
Cerro Gordo County
23,686 23,709 23,154
Cherokee County
5,963 5,886 5,976
Chickasaw County
6,510 6,403 6,433
Clarke County
4,871 4,870 4,742
Clay County
8,611 8,556 8,455
Clayton County
10,148 10,082 10,285
Clinton County
22,346 22,455 22,723
Crawford County
8,041 7,990 8,112
Dallas County
49,463 49,151 47,542
Davis County
4,291 4,257 4,227
Decatur County
4,348 4,379 4,364
Delaware County
10,484 10,378 10,469
Des Moines County
19,554 19,520 19,550
Dickinson County
10,111 9,524 9,875
Dubuque County
56,402 56,797 55,211
Emmet County
5,266 5,199 5,351
Fayette County
10,742 10,821 10,439
Floyd County
8,917 8,910 8,711
Franklin County
5,839 5,755 5,802
Fremont County
3,754 3,757 3,733
Greene County
5,462 5,413 5,415
Grundy County
6,562 6,533 6,545
Guthrie County
5,685 5,610 5,561
Hamilton County
6,968 6,931 6,935
Hancock County
5,979 5,921 5,979
Hardin County
8,237 8,158 8,267
Harrison County
7,413 7,359 7,283
Henry County
9,750 9,708 9,560
Howard County
5,294 5,262 5,163
Humboldt County
5,255 5,183 5,220
Ida County
4,121 4,096 4,120
Iowa County
10,510 10,532 10,269
Jackson County
11,124 11,058 10,962
Jasper County
19,765 19,657 19,233
Jefferson County
9,335 9,289 9,251
Johnson County
84,814 86,581 84,311
Jones County
10,425 10,504 10,405
Keokuk County
5,029 5,024 5,151
Kossuth County
8,510 8,400 8,607
Lee County
15,792 16,059 15,887
Linn County
120,264 121,602 118,749
Louisa County
6,109 6,070 6,036
Lucas County
4,617 4,590 4,414
Lyon County
6,984 6,872 6,978
Madison County
8,642 8,616 8,342
Mahaska County
11,890 11,846 11,782
Marion County
18,609 18,567 17,840
Marshall County
17,539 17,532 17,838
Mills County
7,477 7,430 7,293
Mitchell County
5,839 5,752 5,751
Monona County
4,443 4,426 4,448
Monroe County
3,966 3,937 3,911
Montgomery County
4,966 4,917 4,929
Muscatine County
21,628 21,730 21,717
O'Brien County
8,188 8,165 8,149
Osceola County
3,526 3,450 3,532
Page County
6,379 6,335 6,441
Palo Alto County
4,970 4,925 4,931
Plymouth County
15,081 14,957 14,633
Pocahontas County
4,316 4,154 4,236
Polk County
274,285 273,427 263,191
Pottawattamie County
49,040 48,930 47,692
Poweshiek County
10,940 10,914 10,846
Ringgold County
2,490 2,438 2,570
Sac County
5,309 5,205 5,359
Scott County
88,908 88,980 86,265
Shelby County
6,654 6,626 6,645
Sioux County
20,422 20,564 20,382
Story County
59,943 60,767 57,040
Tama County
9,625 9,573 9,404
Taylor County
3,187 3,159 3,260
Union County
6,264 6,264 6,405
Van Buren County
3,610 3,586 3,698
Wapello County
17,648 17,780 17,600
Warren County
28,642 28,530 27,514
Washington County
11,961 12,120 12,002
Wayne County
2,761 2,734 2,757
Webster County
19,106 19,073 19,241
Winneshiek County
12,299 12,269 12,038
Winnebago County
4,960 4,943 4,964
Woodbury County
56,664 56,722 54,338
Worth County
4,143 4,112 4,174
Wright County
6,460 6,407 6,446
   

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