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. The median across all 102 is -2.1%. Biggest climber in the top 100 since 2020: Richland County, IL, up 55 places to #19.

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IllinoisAll states All rankings

SAME RANKING BYCities States Metros

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS 2000

01Alexander County, ILIL4,570-12.8%−3.0 pts

02▲16Lawrence County, ILIL13,790-9.8%−6.5 pts

03▲1Pulaski County, ILIL4,820-7.2%−4.9 pts

04▲7Gallatin County, ILIL4,616-6.7%0.0 pts

05▲3Henderson County, ILIL5,984-6.3%−7.8 pts

06Greene County, ILIL11,313-5.6%−2.0 pts

07▲23Edwards County, ILIL5,898-5.6%+0.7 pts

08▲4Mason County, ILIL12,411-5.2%−3.7 pts

09▼7McDonough County, ILIL25,916-4.9%+1.8 pts

10▲13Massac County, ILIL13,502-4.7%−7.5 pts

11▲14Hancock County, ILIL16,803-4.6%+1.2 pts

12▲35White County, ILIL13,250-4.5%+2.4 pts

13▲25Macon County, ILIL99,300-4.5%−2.4 pts

14▲46Cass County, ILIL12,463-4.4%−6.4 pts

15▲28Knox County, ILIL47,767-4.4%−3.4 pts

16▲39Saline County, ILIL22,772-4.2%−4.9 pts

17▲35Wabash County, ILIL10,907-4.0%−2.7 pts

18▲2Vermilion County, ILIL71,259-3.9%+1.0 pts

19▲55Richland County, ILIL15,219-3.8%−1.4 pts

20▲15Perry County, ILIL20,160-3.7%−11.6 pts

21▲43Clay County, ILIL12,793-3.7%−4.4 pts

22▲29Warren County, ILIL16,222-3.6%−1.3 pts

23▲26Lee County, ILIL32,914-3.6%−8.5 pts

24▲37Marion County, ILIL36,382-3.6%−3.9 pts

25▼3Schuyler County, ILIL6,657-3.5%+0.6 pts

26▲42Menard County, ILIL11,863-3.5%−15.4 pts

27▼14Pike County, ILIL14,231-3.4%−2.3 pts

28▼7Iroquois County, ILIL26,150-3.4%−5.2 pts

29▲41Union County, ILIL16,656-3.4%−7.2 pts

30▲42Fayette County, ILIL20,790-3.2%−7.6 pts

31▼12Edgar County, ILIL16,323-3.2%−3.8 pts

32Stephenson County, ILIL43,220-3.2%−5.1 pts

33▼24Calhoun County, ILIL4,300-3.1%+1.4 pts

34▲23Mercer County, ILIL15,229-3.0%−1.1 pts

35▼9Logan County, ILIL27,182-2.9%−4.1 pts

36▲17Whiteside County, ILIL54,121-2.8%−3.6 pts

37▲25Jasper County, ILIL9,032-2.7%+1.9 pts

38▲3Macoupin County, ILIL43,748-2.7%−5.5 pts

39▲20Jefferson County, ILIL36,147-2.6%−10.8 pts

40▲14St. Clair County, ILIL250,708-2.6%0.0 pts

41▼7De Witt County, ILIL15,118-2.6%−4.3 pts

42▼39Pope County, ILIL3,672-2.4%−3.3 pts

43▲33Henry County, ILIL48,095-2.4%−2.1 pts

44▲19Ford County, ILIL13,216-2.3%−2.1 pts

45▲13Franklin County, ILIL36,916-2.3%+0.9 pts

46▼1Cumberland County, ILIL10,208-2.3%−7.8 pts

47▼18Marshall County, ILIL11,473-2.3%−4.9 pts

48▲32Adams County, ILIL64,267-2.2%−5.5 pts

49▲1Bureau County, ILIL32,510-2.2%−1.7 pts

50▼4Clark County, ILIL15,114-2.2%−9.0 pts

51▼27Livingston County, ILIL35,057-2.1%−3.1 pts

52▼35Fulton County, ILIL32,901-2.1%−2.6 pts

53▲20Jo Daviess County, ILIL21,594-2.0%−4.1 pts

54▼17Shelby County, ILIL20,576-2.0%−4.8 pts

55▲26Rock Island County, ILIL141,869-1.9%−2.4 pts

56▼8Kankakee County, ILIL105,525-1.8%−9.7 pts

57▲9Wayne County, ILIL15,882-1.8%−1.3 pts

58▲38Carroll County, ILIL15,419-1.8%−1.0 pts

59▲16Peoria County, ILIL178,553-1.8%−2.1 pts

60▲18Christian County, ILIL33,443-1.7%−4.5 pts

61▲4LaSalle County, ILIL107,773-1.7%−6.0 pts

62▼35Scott County, ILIL4,866-1.7%+0.2 pts

63▼19Hamilton County, ILIL7,859-1.7%−3.1 pts

64▼59Hardin County, ILIL3,588-1.7%+5.8 pts

65▼32Jersey County, ILIL21,160-1.6%−7.1 pts

66▲28Cook County, ILIL5,194,625-1.5%−6.9 pts

67▼52Stark County, ILIL5,319-1.5%+1.6 pts

68▼37Washington County, ILIL13,564-1.4%−2.7 pts

69▼41Morgan County, ILIL32,515-1.2%−1.8 pts

70▲15Sangamon County, ILIL194,170-1.1%−7.0 pts

71▲8Moultrie County, ILIL14,371-1.1%−3.6 pts

72▲11Madison County, ILIL263,110-1.0%−4.9 pts

73▼2Tazewell County, ILIL130,049-1.0%−4.9 pts

74▲12Woodford County, ILIL38,111-0.9%−9.5 pts

75▼65Jackson County, ILIL52,501-0.9%+1.5 pts

76▼60Randolph County, ILIL29,921-0.8%+1.2 pts

77▼8Ogle County, ILIL51,399-0.8%−11.8 pts

78▼39Montgomery County, ILIL28,076-0.7%−0.5 pts

79▼12Winnebago County, ILIL283,674-0.6%−10.7 pts

80▼73Coles County, ILIL46,607-0.5%−3.6 pts

81▲11Effingham County, ILIL34,519-0.4%−8.5 pts

82▲19Monroe County, ILIL34,840-0.3%−23.5 pts

83▼47Putnam County, ILIL5,619-0.3%−6.5 pts

84▼42Crawford County, ILIL18,648-0.2%−5.2 pts

85▲6Williamson County, ILIL67,225+0.1%−6.1 pts

86▲9DuPage County, ILIL934,298+0.2%−15.5 pts

87▼5Boone County, ILIL53,568+0.2%−35.4 pts

88▲2McLean County, ILIL171,419+0.3%−16.2 pts

89▲11Johnson County, ILIL13,363+0.4%−13.1 pts

90▼13Clinton County, ILIL37,128+0.6%−4.1 pts

91▲2Lake County, ILIL719,339+0.7%−24.1 pts

92▼5Piatt County, ILIL16,791+0.7%−4.5 pts

93▼9Douglas County, ILIL19,880+0.7%−1.6 pts

94▼54Bond County, ILIL16,959+1.4%−16.2 pts

95▼39DeKalb County, ILIL101,835+1.4%−12.8 pts

96▼8Kane County, ILIL525,757+1.8%−25.5 pts

97Champaign County, ILIL209,972+2.0%−1.8 pts

98Will County, ILIL712,253+2.3%−38.3 pts

99▼10McHenry County, ILIL317,751+2.4%−39.5 pts

100▼86Brown County, ILIL6,401+2.5%−16.6 pts

101▼2Grundy County, ILIL54,052+2.9%−13.2 pts

102Kendall County, ILIL145,470+10.3%−28.1 pts

SHOWING 1–102 OF 102

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU POPULATION ESTIMATES