1. Adams County, Iowa, USA (1)
2. Allamakee County, Iowa, USA (1)
3. Black Hawk County, Iowa, USA (3)
4. Boone County, Iowa, USA (1)
5. Bremer County, Iowa, USA (1)
6. Cedar County, Iowa, USA (1)
7. Cerro Gordo County, Iowa, USA (2)
8. Chickasaw County, Iowa, USA (1)
9. Clayton County, Iowa, USA (3)
10. Delaware County, Iowa, USA (7) 
11. Des Moines County, Iowa, USA (1)
12. Dubuque County, Iowa, USA (5)
13. Emmet County, Iowa, USA (1)
14. Floyd County, Iowa, USA (2)
15. Fremont County, Iowa, USA (2)
16. Hancock County, Iowa, USA (9)
17. Harden County, Iowa, USA
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18. Hardin County, Iowa, USA (1)
19. Henry County, Iowa, USA (4)
20. Iowa, USA
21. Jasper County, Iowa, USA (1)
22. Johnson County, Iowa, USA (1)
23. Johnston County, Iowa, USA (1)
24. Keokuk County, Iowa, USA
25. Kossuth County, Iowa, USA (3)
26. Lee County, Iowa, USA (1)
27. Linn County, Iowa, USA (1)
28. Louisa County, Iowa, USA (4)
29. Lyon County, Iowa, USA (1)
30. Mahaska County, Iowa, USA (1)
31. Marshall County, Iowa, USA (1)
32. Mitchell County, Iowa, USA (1)
33. Muscatine County, Iowa, USA (2)
34. Osceola County, Iowa, USA (2)
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35. Plymouth County, Iowa, USA (2)
36. Polk County, Iowa, USA (7)
37. Pottawattamie County, Iowa, USA (1)
38. Ringgold County, Iowa, USA (1)
39. Sac County, Iowa, USA (3)
40. Scott County, Iowa, USA (2)
41. Shelby County, Iowa, USA (1)
42. Story County, Iowa, USA (3)
43. Tama County, Iowa, USA (2)
44. Union County, Iowa, USA (1)
45. Van Buren County, Iowa, USA
46. Wapello County, Iowa, USA (1)
47. Washington County, Iowa, USA (1)
48. Webster County, Iowa, USA (1)
49. Winnebago County, Iowa, USA (3)
50. Woodbury County, Iowa, USA (1)
51. Worth County, Iowa, USA (1)
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