RANKING · 2000 CENSUS · 99 SHOWN OF 99

Fastest shrinking, Iowa counties · 2000

Iowa counties with the steepest population decline since the prior decennial census. This list covers the 99 counties in Iowa that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

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YEAR2000 2010 2020

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Pocahontas County, IAIA6,819-9.1%+0%

02Adams County, IAIA3,617-7.9%+0%

03Kossuth County, IAIA14,322-7.7%+0%

04Cherokee County, IAIA11,369-7.5%+0%

05Audubon County, IAIA5,509-6.9%+0%

06Sac County, IAIA9,525-6.5%+0%

07Ida County, IAIA6,777-6.3%+0%

08Franklin County, IAIA9,868-5.8%+0%

09Palo Alto County, IAIA8,899-4.9%+0%

10Wayne County, IAIA6,738-4.8%+0%

11Emmet County, IAIA9,107-4.7%+0%

12Hancock County, IAIA10,528-4.3%+0%

13Osceola County, IAIA5,980-3.6%+0%

14Humboldt County, IAIA9,409-3.5%+0%

15Union County, IAIA11,829-3.5%+0%

16Calhoun County, IAIA9,562-3.4%+0%

17Winnebago County, IAIA10,251-3.3%+0%

18Cass County, IAIA12,960-2.9%+0%

19Butler County, IAIA14,049-2.7%+0%

20Fremont County, IAIA6,522-2.6%+0%

21Montgomery County, IAIA10,002-2.5%+0%

22O'Brien County, IAIA14,220-2.2%+0%

23Taylor County, IAIA5,835-2.2%+0%

24Adair County, IAIA7,403-2.0%+0%

25Clayton County, IAIA16,845-2.0%+0%

26Keokuk County, IAIA9,797-1.9%+0%

27Clinton County, IAIA46,002-1.7%+0%

28Lee County, IAIA32,306-1.6%+0%

29Lyon County, IAIA12,354-1.6%+0%

30Chickasaw County, IAIA11,663-1.5%+0%

31Hardin County, IAIA16,455-1.5%+0%

32Clay County, IAIA16,202-1.2%+0%

33Monroe County, IAIA7,406-1.2%+0%

34Poweshiek County, IAIA18,368-1.1%+0%

35Worth County, IAIA7,338-1.0%+0%

36Floyd County, IAIA14,901-0.9%+0%

37Jefferson County, IAIA15,291-0.8%+0%

38Des Moines County, IAIA38,077-0.6%+0%

39Cerro Gordo County, IAIA42,372-0.6%+0%

40Mitchell County, IAIA10,650-0.5%+0%

41Shelby County, IAIA11,689-0.4%+0%

42Webster County, IAIA36,838-0.3%+0%

43Appanoose County, IAIA12,077-0.2%+0%

44Monona County, IAIA8,539-0.1%+0%

45Carroll County, IAIA20,303-0.0%+0%

46Wright County, IAIA12,801+0.5%+0%

47Page County, IAIA14,856+0.6%+0%

48Fayette County, IAIA19,047+0.8%+0%

49Ringgold County, IAIA4,642+0.9%+0%

50Crawford County, IAIA16,237+1.0%+0%

51Wapello County, IAIA35,210+1.0%+0%

52Buchanan County, IAIA20,883+1.2%+0%

53Howard County, IAIA9,415+1.3%+0%

54Van Buren County, IAIA7,131+1.7%+0%

55Jackson County, IAIA19,288+1.7%+0%

56Delaware County, IAIA17,674+2.0%+0%

57Winneshiek County, IAIA19,733+2.2%+0%

58Buena Vista County, IAIA20,449+2.2%+0%

59Bremer County, IAIA25,296+2.2%+0%

60Hamilton County, IAIA14,944+2.3%+0%

61Marshall County, IAIA39,890+2.7%+0%

62Davis County, IAIA9,230+2.8%+0%

63Grundy County, IAIA12,361+2.8%+0%

64Dubuque County, IAIA99,381+3.2%+0%

65Greene County, IAIA8,658+3.2%+0%

66Black Hawk County, IAIA131,532+3.4%+0%

67Mahaska County, IAIA21,880+3.8%+0%

68Guthrie County, IAIA10,782+3.8%+0%

69Lucas County, IAIA8,847+3.9%+0%

70Tama County, IAIA16,796+3.9%+0%

71Jones County, IAIA21,253+4.0%+0%

72Boone County, IAIA26,799+4.1%+0%

73Decatur County, IAIA7,655+4.2%+0%

74Muscatine County, IAIA41,853+4.5%+0%

75Cedar County, IAIA18,359+4.6%+0%

76Scott County, IAIA175,259+5.1%+0%

77Louisa County, IAIA10,416+5.1%+0%

78Washington County, IAIA22,667+5.4%+0%

79Sioux County, IAIA36,774+5.6%+0%

80Woodbury County, IAIA106,649+5.7%+0%

81Henry County, IAIA19,349+5.8%+0%

82Allamakee County, IAIA14,238+5.9%+0%

83Pottawattamie County, IAIA92,996+6.1%+0%

84Plymouth County, IAIA25,697+6.2%+0%

85Harrison County, IAIA14,623+6.4%+0%

86Marion County, IAIA34,192+6.8%+0%

87Jasper County, IAIA38,153+6.9%+0%

88Iowa County, IAIA16,504+7.1%+0%

89Story County, IAIA101,291+7.7%+0%

90Dickinson County, IAIA18,077+10.2%+0%

91Mills County, IAIA14,793+10.2%+0%

92Clarke County, IAIA9,574+10.2%+0%

93Madison County, IAIA17,270+12.3%+0%

94Benton County, IAIA26,004+12.8%+0%

95Warren County, IAIA57,331+12.9%+0%

96Linn County, IAIA232,028+13.6%+0%

97Polk County, IAIA516,546+14.5%+0%

98Johnson County, IAIA160,044+15.5%+0%

99Dallas County, IAIA118,457+37.0%+0%

SHOWING 1–99 OF 99

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UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES