DECIMAL CLASSIFICATION 
Iowa 
977-75 
A451 
752 
753 
7 
754 
A 
788 
I 
756 
757 
758 
759 
6 
76 
761 
»62 
763 
.764 
765 
5 
766 
767 
768 
260 
L 
77 
mn 
73 
773 
774 
775 
776 
777 
778 
779 
75 
781 
782 
783 
784 
478% 
6 
»8A 
5 
n8m 
5 
788 
780 
Central counties 
Webster 
Fort Dodge 
Hamilton 
Hardin 
Grundy 
Boone 
Story 
Marshall 
Marshalltown 
Tama 
Dallas 
Polk 
Des Moines 
Jasper 
Poweshiek 
Central east counties 
Benton - 
Linn 
Cedar Rapids 
Jones 
Jackson 
Towa 
Johnson 
Cedar 
Clinton 
Clinton (city) 
Muscatine 
Muscatine (city) 
Scott 
Davenport 
Southwest counties 
Pottawattamie 
Council Bluffs 
Cass 
Adair 
Mills 
Montgomery 
Adams 
Fremont 
Page 
Taylor 
entral south counties 
Madison 
Warren 
Marion 
Mahaska 
Union 
Clarke 
Lucas 
Monroe 
Ringgold 
Decatur 
Wayne 
Appanocose 
Population in 1920 
37 611 
19 347 
I9 531 
23 337 
14 420 
29 892 
26 185 
32 630 
21 861 
25 120 
154 029 
Iy 731 
126 468 
27 855 
19 9IO 
24 080 
74 004 
18 607 
19 931 
18 600 
26 462 
17 560 
43 371 
15 506 
29 042 
73 952 
24 I51 
10 068 
56 72% 
61 550 
36 162 
19 421 
I4 259 
15 422 
17 048 
10 521 
I5 447 
24 137 
15 514 
15 020 
18 047 
24 957 
26 270 
17 268 
10 506 
15 686 
23 467 
12 91g 
16 566 
15 378 
30 535