1. Adair County, Iowa, USA (2)
2. Allamakee County, Iowa, USA (2)
3. Black Hawk County, Iowa, USA (1)
4. Boone County, Iowa, USA (2) 
5. Bremer County, Iowa, USA (3)
6. Buchanan County, Iowa, USA (1)
7. Calhoun County, Iowa, USA (1)
8. Carroll County, Iowa, USA (1)
9. Cass County, Iowa, USA (1)
10. Cerro Gordo County, Iowa, USA (2)
11. Cherokee County, Iowa, USA (1)
12. Chickasaw County, Iowa, USA (1)
13. Clay County, Iowa, USA (1)
14. Clayton County, Iowa, USA (4)
15. Clinton County, Iowa, USA (1)
16. Crawford County, Iowa, USA (1)
17. Davis County, Iowa, USA (2)
18. Decatur County, Iowa, USA (1)
19. Delaware County, Iowa, USA (1)
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20. Des Moines County, Iowa, USA (1)
21. Dubuque County, Iowa, USA (1)
22. Emmet County, Iowa, USA (1)
23. Fayette County, Iowa, USA (3)
24. Hamilton County, Iowa, USA (1)
25. Hancock County, Iowa, USA (2)
26. Hardin-Franklin County, Iowa, USA (1)
27. Humboldt County, Iowa, USA (4)
28. Iowa, USA
29. Jackson County, Iowa, USA (2)
30. Jasper County, Iowa, USA (1)
31. Johnson County, Iowa, USA (1)
32. Kossuth County, Iowa, USA (5)
33. Lee County, Iowa, USA (1)
34. Linn County, Iowa, USA (2)
35. Louisa County, Iowa, USA (1)
36. Lyon County, Iowa, USA (7)
37. Montgomery County, Iowa, USA (1)
38. Muscatine County, Iowa, USA (1)
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39. O'Brien County, Iowa, USA (1)
40. Page County, Iowa, USA (1)
41. Palo Alto County, Iowa, USA (3)
42. Plymouth County, Iowa, USA (2)
43. Pocahontas County, Iowa, USA (2)
44. Pottawattamie County, Iowa, USA (2)
45. Poweshiek County, Iowa, USA (2)
46. Scott County, Iowa, USA (1)
47. Sioux County, Iowa, USA (4)
48. Story County, Iowa, USA (1)
49. Taylor County, Iowa, USA (1)
50. Union County, Iowa, USA (1)
51. Wapello County, Iowa, USA (2)
52. Warren County, Iowa, USA (1)
53. Webster County, Iowa, USA (2)
54. Winnesheik County, Iowa, USA (1)
55. Woodbury County, Iowa, USA (1)
56. Wright County, Iowa, USA (3)
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