RANKING · 2025 ESTIMATES · 102 SHOWN OF 102

Fastest shrinking, Illinois counties

Illinois counties with the steepest population decline from the 2020 census to 2025. This list covers the 102 counties in Illinois 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

01Alexander County, ILIL4,570-12.8%+31%

02Lawrence County, ILIL13,790-9.8%+200%

03Pulaski County, ILIL4,820-7.2%+209%

04Gallatin County, ILIL4,616-6.7%−1%

05Henderson County, ILIL5,984-6.3%−537%

06Greene County, ILIL11,313-5.6%+54%

07Edwards County, ILIL5,898-5.6%−12%

08Mason County, ILIL12,411-5.2%+263%

09McDonough County, ILIL25,916-4.9%−27%

10Massac County, ILIL13,502-4.7%−270%

11Hancock County, ILIL16,803-4.6%−21%

12White County, ILIL13,250-4.5%−35%

13Macon County, ILIL99,300-4.5%+112%

14Cass County, ILIL12,463-4.4%−331%

15Knox County, ILIL47,767-4.4%+346%

16Saline County, ILIL22,772-4.2%−711%

17Wabash County, ILIL10,907-4.0%+201%

18Vermilion County, ILIL71,259-3.9%−20%

19Richland County, ILIL15,219-3.8%+57%

20Perry County, ILIL20,160-3.7%−148%

21Clay County, ILIL12,793-3.7%−639%

22Warren County, ILIL16,222-3.6%+57%

23Lee County, ILIL32,914-3.6%−174%

24Marion County, ILIL36,382-3.6%−1241%

25Schuyler County, ILIL6,657-3.5%−14%

26Menard County, ILIL11,863-3.5%−130%

27Pike County, ILIL14,231-3.4%+214%

28Iroquois County, ILIL26,150-3.4%−293%

29Union County, ILIL16,656-3.4%−189%

30Fayette County, ILIL20,790-3.2%−175%

31Edgar County, ILIL16,323-3.2%−679%

32Stephenson County, ILIL43,220-3.2%−264%

33Calhoun County, ILIL4,300-3.1%−31%

34Mercer County, ILIL15,229-3.0%+55%

35Logan County, ILIL27,182-2.9%−330%

36Whiteside County, ILIL54,121-2.8%−463%

37Jasper County, ILIL9,032-2.7%−41%

38Macoupin County, ILIL43,748-2.7%−196%

39Jefferson County, ILIL36,147-2.6%−132%

40St. Clair County, ILIL250,708-2.6%+1%

41De Witt County, ILIL15,118-2.6%−250%

42Pope County, ILIL3,672-2.4%−364%

43Henry County, ILIL48,095-2.4%+788%

44Ford County, ILIL13,216-2.3%+887%

45Franklin County, ILIL36,916-2.3%−27%

46Cumberland County, ILIL10,208-2.3%−142%

47Marshall County, ILIL11,473-2.3%−188%

48Adams County, ILIL64,267-2.2%−168%

49Bureau County, ILIL32,510-2.2%+326%

50Clark County, ILIL15,114-2.2%−132%

51Livingston County, ILIL35,057-2.1%−321%

52Fulton County, ILIL32,901-2.1%−572%

53Jo Daviess County, ILIL21,594-2.0%−193%

54Shelby County, ILIL20,576-2.0%−169%

55Rock Island County, ILIL141,869-1.9%−543%

56Kankakee County, ILIL105,525-1.8%−123%

57Wayne County, ILIL15,882-1.8%+252%

58Carroll County, ILIL15,419-1.8%+131%

59Peoria County, ILIL178,553-1.8%−644%

60Christian County, ILIL33,443-1.7%−162%

61LaSalle County, ILIL107,773-1.7%−140%

62Scott County, ILIL4,866-1.7%−12%

63Hamilton County, ILIL7,859-1.7%−217%

64Hardin County, ILIL3,588-1.7%−78%

65Jersey County, ILIL21,160-1.6%−130%

66Cook County, ILIL5,194,625-1.5%−129%

67Stark County, ILIL5,319-1.5%−51%

68Washington County, ILIL13,564-1.4%−217%

69Morgan County, ILIL32,515-1.2%−302%

70Sangamon County, ILIL194,170-1.1%−119%

71Moultrie County, ILIL14,371-1.1%−142%

72Madison County, ILIL263,110-1.0%−127%

73Tazewell County, ILIL130,049-1.0%−125%

74Woodford County, ILIL38,111-0.9%−111%

75Jackson County, ILIL52,501-0.9%−63%

76Randolph County, ILIL29,921-0.8%−60%

77Ogle County, ILIL51,399-0.8%−107%

78Montgomery County, ILIL28,076-0.7%+203%

79Winnebago County, ILIL283,674-0.6%−106%

80Coles County, ILIL46,607-0.5%−118%

81Effingham County, ILIL34,519-0.4%−105%

82Monroe County, ILIL34,840-0.3%−102%

83Putnam County, ILIL5,619-0.3%−105%

84Crawford County, ILIL18,648-0.2%−103%

85Williamson County, ILIL67,225+0.1%−98%

86DuPage County, ILIL934,298+0.2%−99%

87Boone County, ILIL53,568+0.2%−99%

88McLean County, ILIL171,419+0.3%−98%

89Johnson County, ILIL13,363+0.4%−97%

90Clinton County, ILIL37,128+0.6%−87%

91Lake County, ILIL719,339+0.7%−97%

92Piatt County, ILIL16,791+0.7%−87%

93Douglas County, ILIL19,880+0.7%−70%

94Bond County, ILIL16,959+1.4%−92%

95DeKalb County, ILIL101,835+1.4%−90%

96Kane County, ILIL525,757+1.8%−93%

97Champaign County, ILIL209,972+2.0%−48%

98Will County, ILIL712,253+2.3%−94%

99McHenry County, ILIL317,751+2.4%−94%

100Brown County, ILIL6,401+2.5%−87%

101Grundy County, ILIL54,052+2.9%−82%

102Kendall County, ILIL145,470+10.3%−73%

SHOWING 1–102 OF 102

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU POPULATION ESTIMATES