RANKING · 2024 ACS · 99 SHOWN OF 99

Largest senior population, Iowa counties

Iowa counties home to the most residents aged 65 and over as of 2024. 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, IAIA516,54670,275+68%

02Linn County, IAIA232,02839,802+70%

03Scott County, IAIA175,25930,617+64%

04Black Hawk County, IAIA131,53223,138+29%

05Johnson County, IAIA160,04420,834+152%

06Dubuque County, IAIA99,38119,152+46%

07Pottawattamie County, IAIA92,99617,508+46%

08Woodbury County, IAIA106,64916,864+22%

09Dallas County, IAIA118,45713,893+207%

10Story County, IAIA101,29113,275+69%

11Cerro Gordo County, IAIA42,37210,036+22%

12Clinton County, IAIA46,0029,378+18%

13Warren County, IAIA57,3319,112+89%

14Des Moines County, IAIA38,0778,180+16%

15Muscatine County, IAIA41,8537,691+42%

16Jasper County, IAIA38,1537,500+26%

17Webster County, IAIA36,8387,323+5%

18Lee County, IAIA32,3067,309+16%

19Marshall County, IAIA39,8907,301+13%

20Marion County, IAIA34,1926,515+28%

21Wapello County, IAIA35,2106,496+1%

22Sioux County, IAIA36,7745,866+23%

23Boone County, IAIA26,7995,324+24%

24Plymouth County, IAIA25,6975,096+29%

25Benton County, IAIA26,0045,093+31%

26Dickinson County, IAIA18,0775,079+50%

27Bremer County, IAIA25,2964,980+33%

28Winneshiek County, IAIA19,7334,632+38%

29Washington County, IAIA22,6674,538+23%

30Jones County, IAIA21,2534,459+39%

31Fayette County, IAIA19,0474,424+6%

32Carroll County, IAIA20,3034,361+9%

33Jackson County, IAIA19,2884,304+23%

34Clayton County, IAIA16,8454,260+23%

35Mahaska County, IAIA21,8804,199+15%

36Jefferson County, IAIA15,2914,192+88%

37Henry County, IAIA19,3494,031+35%

38Hardin County, IAIA16,4553,968+2%

39Poweshiek County, IAIA18,3683,967+20%

40Cedar County, IAIA18,3593,859+31%

41Buchanan County, IAIA20,8833,855+26%

42Delaware County, IAIA17,6743,784+37%

43Clay County, IAIA16,2023,686+18%

44Kossuth County, IAIA14,3223,686+7%

45Page County, IAIA14,8563,664+9%

46Tama County, IAIA16,7963,537+4%

47Floyd County, IAIA14,9013,526+9%

48Buena Vista County, IAIA20,4493,373−2%

49Iowa County, IAIA16,5043,350+25%

50Butler County, IAIA14,0493,306+7%

51Allamakee County, IAIA14,2383,258+21%

52Hamilton County, IAIA14,9443,157+7%

53Cass County, IAIA12,9603,061+0%

54Madison County, IAIA17,2702,995+41%

55O'Brien County, IAIA14,2202,989−6%

56Harrison County, IAIA14,6232,946+7%

57Crawford County, IAIA16,2372,928+1%

58Mills County, IAIA14,7932,921+59%

59Cherokee County, IAIA11,3692,885+9%

60Appanoose County, IAIA12,0772,882+5%

61Wright County, IAIA12,8012,827−7%

62Shelby County, IAIA11,6892,724+1%

63Chickasaw County, IAIA11,6632,671+14%

64Grundy County, IAIA12,3612,600+9%

65Guthrie County, IAIA10,7822,591+11%

66Hancock County, IAIA10,5282,554+18%

67Union County, IAIA11,8292,490+8%

68Montgomery County, IAIA10,0022,361−1%

69Sac County, IAIA9,5252,351−10%

70Winnebago County, IAIA10,2512,341+6%

71Calhoun County, IAIA9,5622,320−6%

72Lyon County, IAIA12,3542,320+5%

73Mitchell County, IAIA10,6502,290−2%

74Keokuk County, IAIA9,7972,233−3%

75Emmet County, IAIA9,1072,230+4%

76Franklin County, IAIA9,8682,147−2%

77Louisa County, IAIA10,4162,146+25%

78Greene County, IAIA8,6582,119−5%

79Monona County, IAIA8,5392,084−13%

80Humboldt County, IAIA9,4092,075−5%

81Palo Alto County, IAIA8,8991,970−9%

82Howard County, IAIA9,4151,932−3%

83Clarke County, IAIA9,5741,924+23%

84Lucas County, IAIA8,8471,917+5%

85Van Buren County, IAIA7,1311,707+14%

86Adair County, IAIA7,4031,684−8%

87Worth County, IAIA7,3381,684+10%

88Pocahontas County, IAIA6,8191,682−11%

89Davis County, IAIA9,2301,661+12%

90Decatur County, IAIA7,6551,639+7%

91Fremont County, IAIA6,5221,575−1%

92Monroe County, IAIA7,4061,548−1%

93Ida County, IAIA6,7771,533−10%

94Wayne County, IAIA6,7381,475−8%

95Audubon County, IAIA5,5091,425−11%

96Osceola County, IAIA5,9801,389+5%

97Taylor County, IAIA5,8351,342−14%

98Ringgold County, IAIA4,6421,099−16%

99Adams County, IAIA3,617876−9%

SHOWING 1–99 OF 99

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES