RANKING · 2010 CENSUS · 99 SHOWN OF 99

Largest senior population, Iowa counties · 2010

Iowa counties home to the most residents aged 65 and over as of 2010. Ranked by number of people, not the senior share. This list covers the 99 counties in Iowa that qualify, ranked against each other statewide.

IowaAll states All rankings

SAME RANKING BYCities States Metros

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPRESIDENTS 65 AND OVERVS 2000

01Polk County, IAIA516,54646,545+11%

02Linn County, IAIA232,02827,488+17%

03Scott County, IAIA175,25921,605+16%

04Black Hawk County, IAIA131,53218,131+1%

05Dubuque County, IAIA99,38114,355+10%

06Pottawattamie County, IAIA92,99613,333+11%

07Woodbury County, IAIA106,64913,125−5%

08Johnson County, IAIA160,04411,211+36%

09Story County, IAIA101,2918,945+14%

10Clinton County, IAIA46,0028,267+4%

11Cerro Gordo County, IAIA42,3727,919−4%

12Des Moines County, IAIA38,0777,096+0%

13Marshall County, IAIA39,8906,677+3%

14Dallas County, IAIA118,4576,476+43%

15Webster County, IAIA36,8386,337−9%

16Warren County, IAIA57,3316,159+28%

17Jasper County, IAIA38,1536,089+2%

18Lee County, IAIA32,3066,078−3%

19Wapello County, IAIA35,2105,856−9%

20Muscatine County, IAIA41,8535,843+8%

21Marion County, IAIA34,1925,192+2%

22Sioux County, IAIA36,7744,808+1%

23Boone County, IAIA26,7994,194−2%

24Bremer County, IAIA25,2964,192+12%

25Plymouth County, IAIA25,6974,149+5%

26Fayette County, IAIA19,0474,055−3%

27Benton County, IAIA26,0044,015+3%

28Carroll County, IAIA20,3033,874−3%

29Washington County, IAIA22,6673,758+2%

30Dickinson County, IAIA18,0773,712+10%

31Jackson County, IAIA19,2883,693+5%

32Hardin County, IAIA16,4553,675−5%

33Mahaska County, IAIA21,8803,598−1%

34Jones County, IAIA21,2533,556+11%

35Winneshiek County, IAIA19,7333,547+6%

36Clayton County, IAIA16,8453,504+1%

37Poweshiek County, IAIA18,3683,488+5%

38Kossuth County, IAIA14,3223,399−2%

39Tama County, IAIA16,7963,274−3%

40Floyd County, IAIA14,9013,263+0%

41Henry County, IAIA19,3493,228+8%

42Buchanan County, IAIA20,8833,205+5%

43Page County, IAIA14,8563,175−6%

44Cedar County, IAIA18,3593,093+5%

45Clay County, IAIA16,2023,066−2%

46Buena Vista County, IAIA20,4493,055−11%

47Butler County, IAIA14,0492,944−4%

48Delaware County, IAIA17,6742,944+7%

49O'Brien County, IAIA14,2202,937−8%

50Cass County, IAIA12,9602,924−4%

51Hamilton County, IAIA14,9442,835−4%

52Iowa County, IAIA16,5042,811+5%

53Allamakee County, IAIA14,2382,803+4%

54Crawford County, IAIA16,2372,793−4%

55Wright County, IAIA12,8012,769−9%

56Harrison County, IAIA14,6232,659−4%

57Cherokee County, IAIA11,3692,604−2%

58Appanoose County, IAIA12,0772,592−5%

59Shelby County, IAIA11,6892,540−6%

60Jefferson County, IAIA15,2912,501+12%

61Chickasaw County, IAIA11,6632,376+1%

62Mitchell County, IAIA10,6502,342−0%

63Grundy County, IAIA12,3612,342−2%

64Madison County, IAIA17,2702,321+9%

65Calhoun County, IAIA9,5622,292−7%

66Sac County, IAIA9,5252,291−12%

67Union County, IAIA11,8292,267−1%

68Monona County, IAIA8,5392,190−9%

69Guthrie County, IAIA10,7822,178−6%

70Hancock County, IAIA10,5282,166−0%

71Montgomery County, IAIA10,0022,141−10%

72Winnebago County, IAIA10,2512,093−6%

73Franklin County, IAIA9,8682,037−7%

74Mills County, IAIA14,7932,023+10%

75Humboldt County, IAIA9,4092,021−7%

76Keokuk County, IAIA9,7972,021−12%

77Palo Alto County, IAIA8,8992,009−7%

78Greene County, IAIA8,6581,951−13%

79Lyon County, IAIA12,3541,948−12%

80Emmet County, IAIA9,1071,939−9%

81Howard County, IAIA9,4151,847−8%

82Lucas County, IAIA8,8471,794−1%

83Louisa County, IAIA10,4161,704−0%

84Adair County, IAIA7,4031,644−10%

85Pocahontas County, IAIA6,8191,617−14%

86Clarke County, IAIA9,5741,549−1%

87Decatur County, IAIA7,6551,533−0%

88Van Buren County, IAIA7,1311,498+0%

89Davis County, IAIA9,2301,493+0%

90Monroe County, IAIA7,4061,482−5%

91Ida County, IAIA6,7771,465−14%

92Fremont County, IAIA6,5221,456−8%

93Audubon County, IAIA5,5091,419−12%

94Wayne County, IAIA6,7381,418−11%

95Worth County, IAIA7,3381,390−9%

96Taylor County, IAIA5,8351,327−15%

97Osceola County, IAIA5,9801,276−4%

98Ringgold County, IAIA4,6421,209−8%

99Adams County, IAIA3,617860−10%

SHOWING 1–99 OF 99

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS