RANKING · 2000 CENSUS · 102 SHOWN OF 102

Fastest growing, Illinois counties · 2000

Illinois counties ranked by population growth from the 1990 census to 2000. 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 shrinking Most population gained Most population lost Most densely populated Most sparsely populated

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION GROWTHVS –

01McHenry County, ILIL317,751+41.9%–

02Will County, ILIL712,253+40.6%–

03Kendall County, ILIL145,470+38.4%–

04Boone County, ILIL53,568+35.6%–

05Kane County, ILIL525,757+27.3%–

06Lake County, ILIL719,339+24.8%–

07Monroe County, ILIL34,840+23.2%–

08Brown County, ILIL6,401+19.1%–

09Bond County, ILIL16,959+17.6%–

10McLean County, ILIL171,419+16.5%–

11Grundy County, ILIL54,052+16.1%–

12DuPage County, ILIL934,298+15.7%–

13DeKalb County, ILIL101,835+14.2%–

14Johnson County, ILIL13,363+13.5%–

15Menard County, ILIL11,863+11.8%–

16Ogle County, ILIL51,399+11.0%–

17Winnebago County, ILIL283,674+10.1%–

18Woodford County, ILIL38,111+8.6%–

19Jefferson County, ILIL36,147+8.2%–

20Effingham County, ILIL34,519+8.1%–

21Kankakee County, ILIL105,525+7.9%–

22Perry County, ILIL20,160+7.9%–

23Clark County, ILIL15,114+6.8%–

24Putnam County, ILIL5,619+6.2%–

25Williamson County, ILIL67,225+6.2%–

26Sangamon County, ILIL194,170+5.9%–

27Jersey County, ILIL21,160+5.5%–

28Cumberland County, ILIL10,208+5.5%–

29Cook County, ILIL5,194,625+5.3%–

30Piatt County, ILIL16,791+5.3%–

31Crawford County, ILIL18,648+5.1%–

32Lee County, ILIL32,914+4.9%–

33Clinton County, ILIL37,128+4.7%–

34Fayette County, ILIL20,790+4.4%–

35LaSalle County, ILIL107,773+4.3%–

36Madison County, ILIL263,110+3.9%–

37Tazewell County, ILIL130,049+3.9%–

38Champaign County, ILIL209,972+3.8%–

39Union County, ILIL16,656+3.8%–

40Adams County, ILIL64,267+3.3%–

41Coles County, ILIL46,607+3.0%–

42Shelby County, ILIL20,576+2.8%–

43Macoupin County, ILIL43,748+2.8%–

44Massac County, ILIL13,502+2.8%–

45Christian County, ILIL33,443+2.8%–

46Marshall County, ILIL11,473+2.6%–

47Moultrie County, ILIL14,371+2.6%–

48Douglas County, ILIL19,880+2.4%–

49Jo Daviess County, ILIL21,594+2.1%–

50Stephenson County, ILIL43,220+1.9%–

51Cass County, ILIL12,463+1.9%–

52Iroquois County, ILIL26,150+1.8%–

53De Witt County, ILIL15,118+1.7%–

54Henderson County, ILIL5,984+1.4%–

55Hamilton County, ILIL7,859+1.4%–

56Logan County, ILIL27,182+1.3%–

57Washington County, ILIL13,564+1.2%–

58Livingston County, ILIL35,057+1.0%–

59Pope County, ILIL3,672+0.9%–

60Whiteside County, ILIL54,121+0.8%–

61Clay County, ILIL12,793+0.7%–

62Saline County, ILIL22,772+0.7%–

63Morgan County, ILIL32,515+0.6%–

64Edgar County, ILIL16,323+0.6%–

65Fulton County, ILIL32,901+0.4%–

66Rock Island County, ILIL141,869+0.4%–

67Peoria County, ILIL178,553+0.3%–

68Marion County, ILIL36,382+0.3%–

69Ford County, ILIL13,216-0.2%–

70Montgomery County, ILIL28,076-0.2%–

71Henry County, ILIL48,095-0.3%–

72Bureau County, ILIL32,510-0.5%–

73Wayne County, ILIL15,882-0.5%–

74Carroll County, ILIL15,419-0.8%–

75Knox County, ILIL47,767-1.0%–

76Pike County, ILIL14,231-1.1%–

77Wabash County, ILIL10,907-1.3%–

78Mason County, ILIL12,411-1.4%–

79Scott County, ILIL4,866-1.9%–

80Mercer County, ILIL15,229-1.9%–

81Randolph County, ILIL29,921-2.0%–

82Macon County, ILIL99,300-2.1%–

83Warren County, ILIL16,222-2.3%–

84Pulaski County, ILIL4,820-2.3%–

85Jackson County, ILIL52,501-2.4%–

86Richland County, ILIL15,219-2.4%–

87St. Clair County, ILIL250,708-2.6%–

88Stark County, ILIL5,319-3.1%–

89Franklin County, ILIL36,916-3.2%–

90Lawrence County, ILIL13,790-3.3%–

91Greene County, ILIL11,313-3.6%–

92Schuyler County, ILIL6,657-4.1%–

93Calhoun County, ILIL4,300-4.5%–

94Jasper County, ILIL9,032-4.6%–

95Vermilion County, ILIL71,259-4.9%–

96Hancock County, ILIL16,803-5.9%–

97Edwards County, ILIL5,898-6.3%–

98McDonough County, ILIL25,916-6.6%–

99Gallatin County, ILIL4,616-6.7%–

100White County, ILIL13,250-7.0%–

101Hardin County, ILIL3,588-7.5%–

102Alexander County, ILIL4,570-9.7%–

SHOWING 1–102 OF 102

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UPDATED 2026-07-15 · DATA: US CENSUS BUREAU DECENNIAL CENSUS