RANKING · 2010 CENSUS · 99 SHOWN OF 99

Fastest shrinking, Iowa counties · 2010

Iowa counties with the steepest population decline from the 2000 census to 2010. This list covers the 99 counties in Iowa that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

RELATEDLargest by population Fastest growing Most population gained Most population lost Most densely populated Most sparsely populated

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Pocahontas County, IAIA6,819-15.6%−6.5 pts

02Calhoun County, IAIA9,562-13.0%−9.6 pts

03Audubon County, IAIA5,509-10.4%−3.5 pts

04Sac County, IAIA9,525-10.2%−3.8 pts

05Adams County, IAIA3,617-10.1%−2.2 pts

06Greene County, IAIA8,658-9.9%−13.1 pts

07Ida County, IAIA6,777-9.5%−3.2 pts

08Kossuth County, IAIA14,322-9.4%−1.8 pts

09Taylor County, IAIA5,835-9.2%−7.0 pts

10Montgomery County, IAIA10,002-8.8%−6.2 pts

11Keokuk County, IAIA9,797-7.8%−5.9 pts

12Monona County, IAIA8,539-7.8%−7.6 pts

13Osceola County, IAIA5,980-7.7%−4.1 pts

14Wright County, IAIA12,801-7.7%−8.2 pts

15Shelby County, IAIA11,689-7.6%−7.2 pts

16Cherokee County, IAIA11,369-7.4%+0.2 pts

17Winnebago County, IAIA10,251-7.3%−4.0 pts

18Palo Alto County, IAIA8,899-7.2%−2.3 pts

19Fremont County, IAIA6,522-7.1%−4.5 pts

20Adair County, IAIA7,403-6.8%−4.8 pts

21Hardin County, IAIA16,455-6.8%−5.3 pts

22Emmet County, IAIA9,107-6.6%−1.9 pts

23Louisa County, IAIA10,416-6.5%−11.6 pts

24Hancock County, IAIA10,528-6.3%−2.0 pts

25Ringgold County, IAIA4,642-6.2%−7.1 pts

26Page County, IAIA14,856-6.1%−6.8 pts

27Appanoose County, IAIA12,077-6.1%−5.9 pts

28Lee County, IAIA32,306-5.8%−4.1 pts

29Lucas County, IAIA8,847-5.6%−9.4 pts

30Webster County, IAIA36,838-5.5%−5.3 pts

31Humboldt County, IAIA9,409-5.5%−2.0 pts

32Fayette County, IAIA19,047-5.1%−5.9 pts

33Chickasaw County, IAIA11,663-5.0%−3.5 pts

34Cass County, IAIA12,960-5.0%−2.0 pts

35Cerro Gordo County, IAIA42,372-4.9%−4.3 pts

36Wayne County, IAIA6,738-4.9%−0.1 pts

37Des Moines County, IAIA38,077-4.8%−4.2 pts

38Harrison County, IAIA14,623-4.7%−11.1 pts

39O'Brien County, IAIA14,220-4.7%−2.4 pts

40Hamilton County, IAIA14,944-4.7%−6.9 pts

41Clay County, IAIA16,202-4.1%−2.8 pts

42Worth County, IAIA7,338-3.9%−2.9 pts

43Howard County, IAIA9,415-3.7%−4.9 pts

44Floyd County, IAIA14,901-3.5%−2.6 pts

45Guthrie County, IAIA10,782-3.5%−7.3 pts

46Delaware County, IAIA17,674-3.5%−5.5 pts

47Van Buren County, IAIA7,131-3.1%−4.8 pts

48Clayton County, IAIA16,845-2.9%−1.0 pts

49Butler County, IAIA14,049-2.9%−0.2 pts

50Carroll County, IAIA20,303-2.8%−2.8 pts

51Decatur County, IAIA7,655-2.7%−6.9 pts

52Allamakee County, IAIA14,238-2.4%−8.3 pts

53Jackson County, IAIA19,288-2.2%−3.9 pts

54Clinton County, IAIA46,002-2.1%−0.3 pts

55Tama County, IAIA16,796-1.9%−5.8 pts

56Woodbury County, IAIA106,649-1.6%−7.3 pts

57Lyon County, IAIA12,354-1.5%+0.0 pts

58Winneshiek County, IAIA19,733-1.2%−3.4 pts

59Wapello County, IAIA35,210-1.2%−2.2 pts

60Jasper County, IAIA38,153-1.0%−7.9 pts

61Henry County, IAIA19,349-0.9%−6.7 pts

62Mitchell County, IAIA10,650-0.9%−0.4 pts

63Buena Vista County, IAIA20,449-0.7%−3.0 pts

64Buchanan County, IAIA20,883-0.6%−1.8 pts

65Monroe County, IAIA7,406-0.6%+0.6 pts

66Franklin County, IAIA9,868-0.2%+5.6 pts

67Mahaska County, IAIA21,880+0.2%−3.6 pts

68Boone County, IAIA26,799+0.3%−3.8 pts

69Poweshiek County, IAIA18,368+0.5%+1.7 pts

70Plymouth County, IAIA25,697+0.6%−5.7 pts

71Grundy County, IAIA12,361+0.7%−2.1 pts

72Crawford County, IAIA16,237+0.9%−0.1 pts

73Dickinson County, IAIA18,077+1.5%−8.7 pts

74Clarke County, IAIA9,574+1.7%−8.5 pts

75Cedar County, IAIA18,359+1.7%−2.9 pts

76Union County, IAIA11,829+1.8%+5.3 pts

77Jones County, IAIA21,253+2.1%−1.9 pts

78Black Hawk County, IAIA131,532+2.4%−1.0 pts

79Muscatine County, IAIA41,853+2.5%−2.1 pts

80Davis County, IAIA9,230+2.5%−0.3 pts

81Benton County, IAIA26,004+3.0%−9.8 pts

82Marshall County, IAIA39,890+3.4%+0.7 pts

83Mills County, IAIA14,793+3.5%−6.7 pts

84Marion County, IAIA34,192+3.9%−2.9 pts

85Bremer County, IAIA25,296+4.1%+1.8 pts

86Jefferson County, IAIA15,291+4.1%+4.9 pts

87Scott County, IAIA175,259+4.1%−1.0 pts

88Iowa County, IAIA16,504+4.4%−2.8 pts

89Washington County, IAIA22,667+5.0%−0.4 pts

90Dubuque County, IAIA99,381+5.1%+1.9 pts

91Pottawattamie County, IAIA92,996+6.2%+0.1 pts

92Sioux County, IAIA36,774+6.7%+1.1 pts

93Linn County, IAIA232,028+10.2%−3.4 pts

94Madison County, IAIA17,270+11.8%−0.5 pts

95Story County, IAIA101,291+12.0%+4.2 pts

96Warren County, IAIA57,331+13.7%+0.8 pts

97Polk County, IAIA516,546+15.0%+0.5 pts

98Johnson County, IAIA160,044+17.9%+2.4 pts

99Dallas County, IAIA118,457+62.3%+25.3 pts

SHOWING 1–99 OF 99

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UPDATED 2026-08-08 · DATA: US CENSUS BUREAU DECENNIAL CENSUS