RANKING · 2000 CENSUS · 99 SHOWN OF 99

Most population lost, Iowa counties · 2000

Iowa counties that lost the most residents from the 1990 census to 2000, by raw count of people rather than percentage. This list covers the 99 counties in Iowa that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION CHANGEVS –

01Kossuth County, IAIA14,322-1,428–

02Cherokee County, IAIA11,369-1,063–

03Clinton County, IAIA46,002-891–

04Pocahontas County, IAIA6,819-863–

05Sac County, IAIA9,525-795–

06Franklin County, IAIA9,868-660–

07Lee County, IAIA32,306-635–

08Emmet County, IAIA9,107-542–

09Hancock County, IAIA10,528-538–

10Ida County, IAIA6,777-528–

11Palo Alto County, IAIA8,899-522–

12Audubon County, IAIA5,509-504–

13Cass County, IAIA12,960-444–

14Union County, IAIA11,829-441–

15Butler County, IAIA14,049-426–

16Winnebago County, IAIA10,251-399–

17Calhoun County, IAIA9,562-393–

18Adams County, IAIA3,617-384–

19Clayton County, IAIA16,845-376–

20Humboldt County, IAIA9,409-375–

21O'Brien County, IAIA14,220-342–

22Wayne County, IAIA6,738-337–

23Montgomery County, IAIA10,002-305–

24Cerro Gordo County, IAIA42,372-286–

25Hardin County, IAIA16,455-282–

26Osceola County, IAIA5,980-264–

27Des Moines County, IAIA38,077-263–

28Keokuk County, IAIA9,797-224–

29Poweshiek County, IAIA18,368-218–

30Fremont County, IAIA6,522-216–

31Clay County, IAIA16,202-213–

32Chickasaw County, IAIA11,663-200–

33Lyon County, IAIA12,354-189–

34Adair County, IAIA7,403-166–

35Floyd County, IAIA14,901-158–

36Taylor County, IAIA5,835-156–

37Jefferson County, IAIA15,291-129–

38Webster County, IAIA36,838-107–

39Monroe County, IAIA7,406-98–

40Worth County, IAIA7,338-82–

41Shelby County, IAIA11,689-57–

42Mitchell County, IAIA10,650-54–

43Appanoose County, IAIA12,077-22–

44Monona County, IAIA8,539-14–

45Carroll County, IAIA20,303-2–

46Ringgold County, IAIA4,642+49–

47Wright County, IAIA12,801+65–

48Page County, IAIA14,856+106–

49Howard County, IAIA9,415+123–

50Van Buren County, IAIA7,131+133–

51Fayette County, IAIA19,047+165–

52Crawford County, IAIA16,237+167–

53Davis County, IAIA9,230+229–

54Buchanan County, IAIA20,883+249–

55Greene County, IAIA8,658+321–

56Grundy County, IAIA12,361+340–

57Jackson County, IAIA19,288+346–

58Decatur County, IAIA7,655+351–

59Lucas County, IAIA8,847+352–

60Wapello County, IAIA35,210+364–

61Hamilton County, IAIA14,944+367–

62Delaware County, IAIA17,674+369–

63Guthrie County, IAIA10,782+418–

64Buena Vista County, IAIA20,449+446–

65Winneshiek County, IAIA19,733+463–

66Bremer County, IAIA25,296+512–

67Louisa County, IAIA10,416+591–

68Tama County, IAIA16,796+684–

69Jones County, IAIA21,253+777–

70Cedar County, IAIA18,359+806–

71Mahaska County, IAIA21,880+813–

72Allamakee County, IAIA14,238+820–

73Clarke County, IAIA9,574+846–

74Harrison County, IAIA14,623+936–

75Marshall County, IAIA39,890+1,035–

76Boone County, IAIA26,799+1,038–

77Iowa County, IAIA16,504+1,041–

78Washington County, IAIA22,667+1,058–

79Henry County, IAIA19,349+1,110–

80Mills County, IAIA14,793+1,345–

81Plymouth County, IAIA25,697+1,461–

82Dickinson County, IAIA18,077+1,515–

83Madison County, IAIA17,270+1,536–

84Sioux County, IAIA36,774+1,686–

85Muscatine County, IAIA41,853+1,815–

86Marion County, IAIA34,192+2,051–

87Jasper County, IAIA38,153+2,418–

88Dubuque County, IAIA99,381+2,740–

89Benton County, IAIA26,004+2,879–

90Black Hawk County, IAIA131,532+4,214–

91Warren County, IAIA57,331+4,638–

92Pottawattamie County, IAIA92,996+5,076–

93Woodbury County, IAIA106,649+5,601–

94Story County, IAIA101,291+5,729–

95Scott County, IAIA175,259+7,689–

96Dallas County, IAIA118,457+10,995–

97Johnson County, IAIA160,044+14,887–

98Linn County, IAIA232,028+22,934–

99Polk County, IAIA516,546+47,461–

SHOWING 1–99 OF 99

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