RANKING · 2000 CENSUS · 99 SHOWN OF 99

Largest senior population, Iowa counties · 2000

Iowa counties home to the most residents aged 65 and over as of 2000. 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 1990

01Polk County, IAIA516,54641,752+11%

02Linn County, IAIA232,02823,465+14%

03Scott County, IAIA175,25918,677+8%

04Black Hawk County, IAIA131,53217,899+6%

05Woodbury County, IAIA106,64913,878−4%

06Dubuque County, IAIA99,38113,103+8%

07Pottawattamie County, IAIA92,99611,972+8%

08Johnson County, IAIA160,0448,265+15%

09Cerro Gordo County, IAIA42,3728,219+4%

10Clinton County, IAIA46,0027,934−2%

11Story County, IAIA101,2917,870+10%

12Des Moines County, IAIA38,0777,067+3%

13Webster County, IAIA36,8386,990−2%

14Marshall County, IAIA39,8906,453−3%

15Wapello County, IAIA35,2106,415−4%

16Lee County, IAIA32,3066,297−2%

17Jasper County, IAIA38,1535,963+8%

18Muscatine County, IAIA41,8535,399+2%

19Marion County, IAIA34,1925,101+5%

20Warren County, IAIA57,3314,815+22%

21Sioux County, IAIA36,7744,753+8%

22Dallas County, IAIA118,4574,531+4%

23Boone County, IAIA26,7994,295−5%

24Fayette County, IAIA19,0474,191+0%

25Carroll County, IAIA20,3034,005+5%

26Plymouth County, IAIA25,6973,964+4%

27Benton County, IAIA26,0043,902+5%

28Hardin County, IAIA16,4553,886−4%

29Bremer County, IAIA25,2963,733−2%

30Washington County, IAIA22,6673,694+1%

31Mahaska County, IAIA21,8803,650−4%

32Jackson County, IAIA19,2883,508+6%

33Clayton County, IAIA16,8453,462+0%

34Kossuth County, IAIA14,3223,454−2%

35Buena Vista County, IAIA20,4493,441−4%

36Tama County, IAIA16,7963,390+0%

37Dickinson County, IAIA18,0773,389+9%

38Page County, IAIA14,8563,364−5%

39Winneshiek County, IAIA19,7333,345+4%

40Poweshiek County, IAIA18,3683,317+4%

41Floyd County, IAIA14,9013,249−3%

42Jones County, IAIA21,2533,199+3%

43O'Brien County, IAIA14,2203,191+0%

44Clay County, IAIA16,2023,124+8%

45Butler County, IAIA14,0493,077−5%

46Buchanan County, IAIA20,8833,056−6%

47Cass County, IAIA12,9603,053−4%

48Wright County, IAIA12,8013,038−4%

49Henry County, IAIA19,3492,990−6%

50Hamilton County, IAIA14,9442,962−0%

51Cedar County, IAIA18,3592,952+1%

52Crawford County, IAIA16,2372,904−1%

53Harrison County, IAIA14,6232,766−4%

54Delaware County, IAIA17,6742,760+4%

55Appanoose County, IAIA12,0772,738−7%

56Allamakee County, IAIA14,2382,700+0%

57Shelby County, IAIA11,6892,688−0%

58Iowa County, IAIA16,5042,681−3%

59Cherokee County, IAIA11,3692,654+2%

60Sac County, IAIA9,5252,614−3%

61Calhoun County, IAIA9,5622,458−10%

62Monona County, IAIA8,5392,398+1%

63Grundy County, IAIA12,3612,386−1%

64Montgomery County, IAIA10,0022,385−10%

65Mitchell County, IAIA10,6502,346−2%

66Chickasaw County, IAIA11,6632,345−1%

67Guthrie County, IAIA10,7822,328+1%

68Keokuk County, IAIA9,7972,301−5%

69Union County, IAIA11,8292,297−7%

70Greene County, IAIA8,6582,240−1%

71Jefferson County, IAIA15,2912,231−7%

72Winnebago County, IAIA10,2512,218−4%

73Lyon County, IAIA12,3542,211+3%

74Franklin County, IAIA9,8682,196−4%

75Humboldt County, IAIA9,4092,179−4%

76Hancock County, IAIA10,5282,170−5%

77Palo Alto County, IAIA8,8992,163−1%

78Emmet County, IAIA9,1072,135−2%

79Madison County, IAIA17,2702,128−5%

80Howard County, IAIA9,4151,999−6%

81Pocahontas County, IAIA6,8191,881−9%

82Mills County, IAIA14,7931,836+1%

83Adair County, IAIA7,4031,821−8%

84Lucas County, IAIA8,8471,821−3%

85Louisa County, IAIA10,4161,712−2%

86Ida County, IAIA6,7771,706+1%

87Audubon County, IAIA5,5091,604−5%

88Wayne County, IAIA6,7381,601−14%

89Fremont County, IAIA6,5221,589−10%

90Monroe County, IAIA7,4061,566−6%

91Clarke County, IAIA9,5741,560+1%

92Taylor County, IAIA5,8351,556−9%

93Decatur County, IAIA7,6551,535−10%

94Worth County, IAIA7,3381,532−8%

95Van Buren County, IAIA7,1311,491−5%

96Davis County, IAIA9,2301,486−5%

97Osceola County, IAIA5,9801,326−6%

98Ringgold County, IAIA4,6421,312−0%

99Adams County, IAIA3,617960−9%

SHOWING 1–99 OF 99

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