RANKING · 2020 CENSUS · 102 SHOWN OF 102

Fastest shrinking, Illinois counties

Illinois counties with the steepest population decline since the prior decennial census. 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 densely populated Most sparsely populated Best broadband access Worst broadband access

YEAR2000 2010 2020

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Alexander County, ILIL4,570-36.4%+273%

02McDonough County, ILIL25,916-16.5%+149%

03Pope County, ILIL3,672-15.8%−1829%

04Pulaski County, ILIL4,820-15.7%+575%

05Hardin County, ILIL3,588-15.5%+107%

06Greene County, ILIL11,313-13.7%+277%

07Coles County, ILIL46,607-13.0%−533%

08Henderson County, ILIL5,984-12.9%−991%

09Calhoun County, ILIL4,300-12.8%+186%

10Jackson County, ILIL52,501-12.0%+405%

11Gallatin County, ILIL4,616-11.5%+71%

12Mason County, ILIL12,411-10.8%+659%

13Pike County, ILIL14,231-10.3%+837%

14Brown County, ILIL6,401-10.0%−152%

15Stark County, ILIL5,319-9.9%+221%

16Randolph County, ILIL29,921-9.9%+396%

17Fulton County, ILIL32,901-9.3%−2191%

18Lawrence County, ILIL13,790-9.2%+183%

19Edgar County, ILIL16,323-9.2%−1755%

20Vermilion County, ILIL71,259-9.1%+85%

21Iroquois County, ILIL26,150-8.9%−600%

22Schuyler County, ILIL6,657-8.5%+107%

23Massac County, ILIL13,502-8.2%−395%

24Livingston County, ILIL35,057-8.0%−939%

25Hancock County, ILIL16,803-7.8%+33%

26Logan County, ILIL27,182-7.6%−712%

27Scott County, ILIL4,866-7.6%+300%

28Morgan County, ILIL32,515-7.4%−1331%

29Marshall County, ILIL11,473-7.1%−373%

30Edwards County, ILIL5,898-7.1%+12%

31Washington County, ILIL13,564-6.5%−631%

32Stephenson County, ILIL43,220-6.5%−435%

33Jersey County, ILIL21,160-6.4%−217%

34De Witt County, ILIL15,118-6.3%−470%

35Perry County, ILIL20,160-6.3%−180%

36Putnam County, ILIL5,619-6.1%−199%

37Shelby County, ILIL20,576-6.1%−316%

38Macon County, ILIL99,300-6.1%+187%

39Montgomery County, ILIL28,076-6.0%+2339%

40Bond County, ILIL16,959-5.9%−133%

41Macoupin County, ILIL43,748-5.9%−308%

42Crawford County, ILIL18,648-5.7%−213%

43Knox County, ILIL47,767-5.6%+465%

44Hamilton County, ILIL7,859-5.5%−482%

45Cumberland County, ILIL10,208-5.4%−199%

46Clark County, ILIL15,114-5.4%−179%

47White County, ILIL13,250-5.4%−23%

48Kankakee County, ILIL105,525-5.2%−167%

49Lee County, ILIL32,914-5.2%−208%

50Bureau County, ILIL32,510-5.0%+856%

51Warren County, ILIL16,222-4.9%+112%

52Wabash County, ILIL10,907-4.9%+270%

53Whiteside County, ILIL54,121-4.8%−718%

54St. Clair County, ILIL250,708-4.7%+82%

55Saline County, ILIL22,772-4.6%−770%

56DeKalb County, ILIL101,835-4.5%−132%

57Mercer County, ILIL15,229-4.5%+132%

58Franklin County, ILIL36,916-4.4%+38%

59Jefferson County, ILIL36,147-4.4%−154%

60Cass County, ILIL12,463-4.4%−329%

61Marion County, ILIL36,382-4.3%−1485%

62Jasper County, ILIL9,032-4.2%−9%

63Ford County, ILIL13,216-3.9%+1531%

64Clay County, ILIL12,793-3.8%−652%

65LaSalle County, ILIL107,773-3.7%−187%

66Wayne County, ILIL15,882-3.5%+564%

67Winnebago County, ILIL283,674-3.4%−133%

68Menard County, ILIL11,863-3.2%−127%

69Ogle County, ILIL51,399-3.2%−129%

70Union County, ILIL16,656-3.2%−183%

71Tazewell County, ILIL130,049-3.0%−177%

72Fayette County, ILIL20,790-2.9%−168%

73Jo Daviess County, ILIL21,594-2.8%−232%

74Richland County, ILIL15,219-2.6%+8%

75Peoria County, ILIL178,553-2.5%−855%

76Henry County, ILIL48,095-2.4%+776%

77Clinton County, ILIL37,128-2.3%−149%

78Christian County, ILIL33,443-2.2%−180%

79Moultrie County, ILIL14,371-2.2%−184%

80Adams County, ILIL64,267-2.0%−162%

81Rock Island County, ILIL141,869-1.9%−545%

82Boone County, ILIL53,568-1.3%−104%

83Madison County, ILIL263,110-1.3%−133%

84Douglas County, ILIL19,880-1.2%−151%

85Sangamon County, ILIL194,170-0.6%−110%

86Woodford County, ILIL38,111-0.5%−106%

87Piatt County, ILIL16,791-0.3%−106%

88Kane County, ILIL525,757+0.2%−99%

89McHenry County, ILIL317,751+0.5%−99%

90McLean County, ILIL171,419+0.8%−95%

91Williamson County, ILIL67,225+1.2%−81%

92Effingham County, ILIL34,519+1.2%−85%

93Lake County, ILIL719,339+1.5%−94%

94Cook County, ILIL5,194,625+1.6%−71%

95DuPage County, ILIL934,298+1.7%−89%

96Carroll County, ILIL15,419+2.0%−363%

97Champaign County, ILIL209,972+2.4%−38%

98Will County, ILIL712,253+2.8%−93%

99Grundy County, ILIL54,052+4.9%−69%

100Johnson County, ILIL13,363+5.8%−57%

101Monroe County, ILIL34,840+6.1%−74%

102Kendall County, ILIL145,470+14.9%−61%

SHOWING 1–102 OF 102

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