RANKING · 2020 CENSUS · 102 SHOWN OF 102

Fastest shrinking, Illinois counties · 2020

Illinois counties with the steepest population decline from the 2010 census to 2020. 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, ILIL4,570-36.4%−26.6 pts

02McDonough County, ILIL25,916-16.5%−9.9 pts

03Pope County, ILIL3,672-15.8%−16.7 pts

04Pulaski County, ILIL4,820-15.7%−13.4 pts

05Hardin County, ILIL3,588-15.5%−8.0 pts

06Greene County, ILIL11,313-13.7%−10.1 pts

07Coles County, ILIL46,607-13.0%−16.0 pts

08Henderson County, ILIL5,984-12.9%−14.3 pts

09Calhoun County, ILIL4,300-12.8%−8.3 pts

10Jackson County, ILIL52,501-12.0%−9.6 pts

11Gallatin County, ILIL4,616-11.5%−4.8 pts

12Mason County, ILIL12,411-10.8%−9.4 pts

13Pike County, ILIL14,231-10.3%−9.2 pts

14Brown County, ILIL6,401-10.0%−29.1 pts

15Stark County, ILIL5,319-9.9%−6.8 pts

16Randolph County, ILIL29,921-9.9%−7.9 pts

17Fulton County, ILIL32,901-9.3%−9.8 pts

18Lawrence County, ILIL13,790-9.2%−6.0 pts

19Edgar County, ILIL16,323-9.2%−9.8 pts

20Vermilion County, ILIL71,259-9.1%−4.2 pts

21Iroquois County, ILIL26,150-8.9%−10.7 pts

22Schuyler County, ILIL6,657-8.5%−4.4 pts

23Massac County, ILIL13,502-8.2%−10.9 pts

24Livingston County, ILIL35,057-8.0%−9.0 pts

25Hancock County, ILIL16,803-7.8%−1.9 pts

26Logan County, ILIL27,182-7.6%−8.9 pts

27Scott County, ILIL4,866-7.6%−5.7 pts

28Morgan County, ILIL32,515-7.4%−8.0 pts

29Marshall County, ILIL11,473-7.1%−9.7 pts

30Edwards County, ILIL5,898-7.1%−0.8 pts

31Washington County, ILIL13,564-6.5%−7.7 pts

32Stephenson County, ILIL43,220-6.5%−8.4 pts

33Jersey County, ILIL21,160-6.4%−11.9 pts

34De Witt County, ILIL15,118-6.3%−8.0 pts

35Perry County, ILIL20,160-6.3%−14.1 pts

36Putnam County, ILIL5,619-6.1%−12.4 pts

37Shelby County, ILIL20,576-6.1%−9.0 pts

38Macon County, ILIL99,300-6.1%−4.0 pts

39Montgomery County, ILIL28,076-6.0%−5.8 pts

40Bond County, ILIL16,959-5.9%−23.5 pts

41Macoupin County, ILIL43,748-5.9%−8.7 pts

42Crawford County, ILIL18,648-5.7%−10.8 pts

43Knox County, ILIL47,767-5.6%−4.6 pts

44Hamilton County, ILIL7,859-5.5%−6.9 pts

45Cumberland County, ILIL10,208-5.4%−10.9 pts

46Clark County, ILIL15,114-5.4%−12.2 pts

47White County, ILIL13,250-5.4%+1.6 pts

48Kankakee County, ILIL105,525-5.2%−13.1 pts

49Lee County, ILIL32,914-5.2%−10.1 pts

50Bureau County, ILIL32,510-5.0%−4.4 pts

51Warren County, ILIL16,222-4.9%−2.6 pts

52Wabash County, ILIL10,907-4.9%−3.6 pts

53Whiteside County, ILIL54,121-4.8%−5.6 pts

54St. Clair County, ILIL250,708-4.7%−2.1 pts

55Saline County, ILIL22,772-4.6%−5.3 pts

56DeKalb County, ILIL101,835-4.5%−18.7 pts

57Mercer County, ILIL15,229-4.5%−2.5 pts

58Franklin County, ILIL36,916-4.4%−1.2 pts

59Jefferson County, ILIL36,147-4.4%−12.6 pts

60Cass County, ILIL12,463-4.4%−6.3 pts

61Marion County, ILIL36,382-4.3%−4.6 pts

62Jasper County, ILIL9,032-4.2%+0.4 pts

63Ford County, ILIL13,216-3.9%−3.6 pts

64Clay County, ILIL12,793-3.8%−4.5 pts

65LaSalle County, ILIL107,773-3.7%−8.0 pts

66Wayne County, ILIL15,882-3.5%−2.9 pts

67Winnebago County, ILIL283,674-3.4%−13.4 pts

68Menard County, ILIL11,863-3.2%−15.1 pts

69Ogle County, ILIL51,399-3.2%−14.2 pts

70Union County, ILIL16,656-3.2%−7.0 pts

71Tazewell County, ILIL130,049-3.0%−6.9 pts

72Fayette County, ILIL20,790-2.9%−7.3 pts

73Jo Daviess County, ILIL21,594-2.8%−5.0 pts

74Richland County, ILIL15,219-2.6%−0.2 pts

75Peoria County, ILIL178,553-2.5%−2.8 pts

76Henry County, ILIL48,095-2.4%−2.1 pts

77Clinton County, ILIL37,128-2.3%−7.0 pts

78Christian County, ILIL33,443-2.2%−5.0 pts

79Moultrie County, ILIL14,371-2.2%−4.7 pts

80Adams County, ILIL64,267-2.0%−5.3 pts

81Rock Island County, ILIL141,869-1.9%−2.4 pts

82Boone County, ILIL53,568-1.3%−37.0 pts

83Madison County, ILIL263,110-1.3%−5.2 pts

84Douglas County, ILIL19,880-1.2%−3.6 pts

85Sangamon County, ILIL194,170-0.6%−6.5 pts

86Woodford County, ILIL38,111-0.5%−9.1 pts

87Piatt County, ILIL16,791-0.3%−5.6 pts

88Kane County, ILIL525,757+0.2%−27.1 pts

89McHenry County, ILIL317,751+0.5%−41.5 pts

90McLean County, ILIL171,419+0.8%−15.6 pts

91Williamson County, ILIL67,225+1.2%−5.0 pts

92Effingham County, ILIL34,519+1.2%−6.8 pts

93Lake County, ILIL719,339+1.5%−23.2 pts

94Cook County, ILIL5,194,625+1.6%−3.8 pts

95DuPage County, ILIL934,298+1.7%−13.9 pts

96Carroll County, ILIL15,419+2.0%+2.8 pts

97Champaign County, ILIL209,972+2.4%−1.5 pts

98Will County, ILIL712,253+2.8%−37.8 pts

99Grundy County, ILIL54,052+4.9%−11.1 pts

100Johnson County, ILIL13,363+5.8%−7.7 pts

101Monroe County, ILIL34,840+6.1%−17.1 pts

102Kendall County, ILIL145,470+14.9%−23.5 pts

SHOWING 1–102 OF 102

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