RANKING · 2020 CENSUS · 99 SHOWN OF 99

Highest Medicare coverage, Iowa counties · 2020

Iowa counties ranked by the share of people covered by Medicare, alone or in combination with other coverage (2020 ACS). A close proxy for retirement geography. This list covers the 99 counties in Iowa that qualify, ranked against each other statewide. The median across all 99 is 21.7%.

IowaAll states All rankings

SAME RANKING BYCities States Metros ZIP codes

RELATEDLargest foreign-born population Most residents with a disability Largest veteran population Most uninsured people Largest senior population Most unmarried people

RANKPLACESTATEPOPMEDICAREVS –

01Dickinson County, IAIA18,07726.9%–

02Monona County, IAIA8,53925.9%–

03Appanoose County, IAIA12,07725.7%–

04Audubon County, IAIA5,50925.4%–

05Kossuth County, IAIA14,32225.2%–

06Page County, IAIA14,85625.1%–

07Clayton County, IAIA16,84525.0%–

08Calhoun County, IAIA9,56224.8%–

09Cherokee County, IAIA11,36924.7%–

10Van Buren County, IAIA7,13124.6%–

11Cass County, IAIA12,96024.5%–

12Shelby County, IAIA11,68924.4%–

13Wright County, IAIA12,80124.4%–

14Greene County, IAIA8,65824.2%–

15Sac County, IAIA9,52524.1%–

16Ringgold County, IAIA4,64223.9%–

17Adams County, IAIA3,61723.8%–

18Taylor County, IAIA5,83523.6%–

19Adair County, IAIA7,40323.6%–

20Butler County, IAIA14,04923.6%–

21Cerro Gordo County, IAIA42,37223.5%–

22Union County, IAIA11,82923.4%–

23Floyd County, IAIA14,90123.3%–

24Fremont County, IAIA6,52223.3%–

25Guthrie County, IAIA10,78223.3%–

26Montgomery County, IAIA10,00223.3%–

27Lee County, IAIA32,30623.2%–

28Des Moines County, IAIA38,07723.0%–

29Jones County, IAIA21,25323.0%–

30Lucas County, IAIA8,84723.0%–

31Allamakee County, IAIA14,23822.9%–

32O'Brien County, IAIA14,22022.9%–

33Fayette County, IAIA19,04722.8%–

34Jefferson County, IAIA15,29122.8%–

35Palo Alto County, IAIA8,89922.8%–

36Pocahontas County, IAIA6,81922.7%–

37Wayne County, IAIA6,73822.7%–

38Humboldt County, IAIA9,40922.6%–

39Keokuk County, IAIA9,79722.6%–

40Clay County, IAIA16,20222.5%–

41Jackson County, IAIA19,28822.3%–

42Hancock County, IAIA10,52822.2%–

43Worth County, IAIA7,33822.2%–

44Osceola County, IAIA5,98021.9%–

45Winnebago County, IAIA10,25121.9%–

46Poweshiek County, IAIA18,36821.8%–

47Emmet County, IAIA9,10721.8%–

48Hamilton County, IAIA14,94421.8%–

49Henry County, IAIA19,34921.8%–

50Mitchell County, IAIA10,65021.7%–

51Franklin County, IAIA9,86821.6%–

52Chickasaw County, IAIA11,66321.4%–

53Ida County, IAIA6,77721.4%–

54Carroll County, IAIA20,30321.3%–

55Clinton County, IAIA46,00221.3%–

56Grundy County, IAIA12,36121.3%–

57Jasper County, IAIA38,15321.3%–

58Decatur County, IAIA7,65521.0%–

59Mills County, IAIA14,79321.0%–

60Clarke County, IAIA9,57420.9%–

61Hardin County, IAIA16,45520.9%–

62Webster County, IAIA36,83820.8%–

63Cedar County, IAIA18,35920.7%–

64Winneshiek County, IAIA19,73320.7%–

65Tama County, IAIA16,79620.5%–

66Wapello County, IAIA35,21020.3%–

67Bremer County, IAIA25,29620.2%–

68Howard County, IAIA9,41520.1%–

69Iowa County, IAIA16,50419.8%–

70Mahaska County, IAIA21,88019.6%–

71Monroe County, IAIA7,40619.6%–

72Pottawattamie County, IAIA92,99619.5%–

73Benton County, IAIA26,00419.4%–

74Delaware County, IAIA17,67419.4%–

75Harrison County, IAIA14,62319.4%–

76Dubuque County, IAIA99,38119.3%–

77Washington County, IAIA22,66719.3%–

78Louisa County, IAIA10,41619.1%–

79Lyon County, IAIA12,35419.1%–

80Buchanan County, IAIA20,88319.0%–

81Boone County, IAIA26,79918.9%–

82Marion County, IAIA34,19218.9%–

83Plymouth County, IAIA25,69718.8%–

84Black Hawk County, IAIA131,53218.4%–

85Marshall County, IAIA39,89018.3%–

86Madison County, IAIA17,27017.9%–

87Crawford County, IAIA16,23717.7%–

88Davis County, IAIA9,23017.6%–

89Scott County, IAIA175,25917.6%–

90Muscatine County, IAIA41,85317.4%–

91Linn County, IAIA232,02816.8%–

92Woodbury County, IAIA106,64916.6%–

93Warren County, IAIA57,33116.2%–

94Buena Vista County, IAIA20,44915.7%–

95Sioux County, IAIA36,77415.7%–

96Polk County, IAIA516,54614.3%–

97Story County, IAIA101,29112.4%–

98Dallas County, IAIA118,45712.3%–

99Johnson County, IAIA160,04412.1%–

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS