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    Jan 1990    
 
 
    Mar 2019
Persons
Name Mar 2019 Feb 2019 Mar 2018
Adair County
4,154 4,204 4,021
Adams County
2,139 2,175 2,060
Allamakee County
7,469 7,487 7,267
Appanoose County
5,949 5,953 5,769
Audubon County
3,135 3,203 2,960
Benton County
13,477 13,505 13,310
Black Hawk County
70,534 69,855 69,259
Boone County
15,060 15,086 14,765
Bremer County
14,075 14,100 13,805
Buchanan County
11,055 11,119 11,057
Buena Vista County
11,431 11,426 11,590
Butler County
7,853 7,930 7,784
Calhoun County
4,261 4,325 4,175
Carroll County
10,786 10,878 10,586
Cass County
7,095 7,111 7,134
Cedar County
10,904 10,889 10,761
Cerro Gordo County
23,676 23,512 23,044
Cherokee County
5,960 6,071 5,846
Chickasaw County
6,443 6,499 6,200
Clarke County
4,946 4,935 4,742
Clay County
8,653 8,658 8,363
Clayton County
10,164 10,232 9,974
Clinton County
22,490 22,403 22,622
Crawford County
8,111 8,246 8,076
Dallas County
48,637 48,395 47,113
Davis County
4,294 4,336 4,172
Decatur County
4,364 4,401 4,306
Delaware County
10,472 10,564 10,278
Des Moines County
19,635 19,344 19,393
Dickinson County
9,505 9,507 9,132
Dubuque County
56,749 56,060 55,184
Emmet County
5,223 5,256 5,216
Fayette County
10,881 10,949 10,575
Floyd County
9,015 9,100 8,645
Franklin County
5,794 5,832 5,631
Fremont County
3,708 3,748 3,625
Greene County
5,480 5,521 5,328
Grundy County
6,612 6,707 6,473
Guthrie County
5,664 5,757 5,471
Hamilton County
6,996 7,056 6,881
Hancock County
5,912 5,978 5,914
Hardin County
8,260 8,378 8,204
Harrison County
7,415 7,466 7,199
Henry County
9,766 9,767 9,555
Howard County
5,371 5,434 5,040
Humboldt County
5,205 5,238 5,087
Ida County
4,155 4,202 4,023
Iowa County
10,613 10,674 10,218
Jackson County
11,087 11,107 10,814
Jasper County
19,565 19,454 19,025
Jefferson County
9,329 9,335 9,235
Johnson County
86,417 85,467 86,202
Jones County
10,601 10,692 10,484
Keokuk County
5,076 5,123 5,043
Kossuth County
8,536 8,630 8,395
Lee County
16,181 16,174 15,799
Linn County
120,842 119,601 119,849
Louisa County
6,138 6,136 6,010
Lucas County
4,627 4,628 4,386
Lyon County
6,919 6,976 6,786
Madison County
8,650 8,654 8,338
Mahaska County
11,819 11,819 11,585
Marion County
18,404 18,205 17,586
Marshall County
17,998 18,024 17,996
Mills County
7,428 7,431 7,232
Mitchell County
5,724 5,848 5,443
Monona County
4,459 4,512 4,390
Monroe County
3,992 4,030 3,860
Montgomery County
4,989 5,038 4,833
Muscatine County
21,792 21,602 21,923
O'Brien County
8,175 8,222 7,990
Osceola County
3,486 3,548 3,410
Page County
6,387 6,423 6,343
Palo Alto County
4,942 4,984 4,737
Plymouth County
14,998 15,145 14,461
Pocahontas County
4,180 4,298 3,931
Polk County
271,019 268,446 262,585
Pottawattamie County
48,935 48,523 47,710
Poweshiek County
10,801 10,795 10,624
Ringgold County
2,481 2,546 2,425
Sac County
5,244 5,328 5,195
Scott County
88,685 87,064 86,566
Shelby County
6,700 6,720 6,551
Sioux County
20,602 20,987 20,141
Story County
60,457 60,262 58,525
Tama County
9,733 9,769 9,434
Taylor County
3,180 3,239 3,207
Union County
6,341 6,397 6,346
Van Buren County
3,604 3,653 3,650
Wapello County
17,828 17,640 17,588
Warren County
28,353 28,155 27,432
Washington County
12,257 12,346 12,143
Wayne County
2,793 2,830 2,739
Webster County
19,015 18,992 18,936
Winneshiek County
12,269 12,331 11,803
Winnebago County
4,997 5,000 4,960
Woodbury County
56,612 56,273 54,621
Worth County
4,152 4,203 4,109
Wright County
6,462 6,532 6,324
   

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