RANKING · 2010 CENSUS · 102 SHOWN OF 102

Fastest growing, Illinois counties · 2010

Illinois counties ranked by population growth from the 2000 census to 2010. 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 2000

01Kendall County, ILIL145,470+110.4%+72.0 pts

02Will County, ILIL712,253+34.9%−5.7 pts

03Grundy County, ILIL54,052+33.4%+17.3 pts

04Boone County, ILIL53,568+29.6%−6.0 pts

05Kane County, ILIL525,757+27.5%+0.2 pts

06Monroe County, ILIL34,840+19.3%−3.9 pts

07McHenry County, ILIL317,751+18.7%−23.2 pts

08DeKalb County, ILIL101,835+18.2%+4.0 pts

09McLean County, ILIL171,419+12.7%−3.7 pts

10Champaign County, ILIL209,972+11.9%+8.1 pts

11Kankakee County, ILIL105,525+9.3%+1.4 pts

12Lake County, ILIL719,339+9.2%−15.6 pts

13Woodford County, ILIL38,111+9.0%+0.4 pts

14Lawrence County, ILIL13,790+8.9%+12.2 pts

15Williamson County, ILIL67,225+8.3%+2.1 pts

16Clinton County, ILIL37,128+6.3%+1.6 pts

17Jersey County, ILIL21,160+6.1%+0.6 pts

18Winnebago County, ILIL283,674+6.1%−4.0 pts

19St. Clair County, ILIL250,708+5.5%+8.0 pts

20Tazewell County, ILIL130,049+5.4%+1.5 pts

21Schuyler County, ILIL6,657+4.9%+9.1 pts

22Ogle County, ILIL51,399+4.8%−6.2 pts

23Sangamon County, ILIL194,170+4.5%−1.4 pts

24Madison County, ILIL263,110+4.0%+0.1 pts

25Moultrie County, ILIL14,371+3.9%+1.3 pts

26Piatt County, ILIL16,791+2.2%−3.0 pts

27LaSalle County, ILIL107,773+2.2%−2.1 pts

28Massac County, ILIL13,502+1.8%−1.0 pts

29Menard County, ILIL11,863+1.8%−10.1 pts

30Jo Daviess County, ILIL21,594+1.7%−0.4 pts

31Peoria County, ILIL178,553+1.7%+1.3 pts

32Fayette County, ILIL20,790+1.6%−2.8 pts

33DuPage County, ILIL934,298+1.4%−14.3 pts

34Franklin County, ILIL36,916+1.4%+4.6 pts

35Pope County, ILIL3,672+1.3%+0.4 pts

36Coles County, ILIL46,607+1.3%−1.7 pts

37Jackson County, ILIL52,501+1.0%+3.4 pts

38Bond County, ILIL16,959+0.8%−16.9 pts

39Richland County, ILIL15,219+0.5%+2.9 pts

40Douglas County, ILIL19,880+0.3%−2.1 pts

41Calhoun County, ILIL4,300+0.1%+4.6 pts

42Effingham County, ILIL34,519-0.1%−8.1 pts

43Lee County, ILIL32,914-0.1%−4.9 pts

44Brown County, ILIL6,401-0.2%−19.3 pts

45Cass County, ILIL12,463-0.4%−2.3 pts

46McDonough County, ILIL25,916-0.9%+5.7 pts

47Henry County, ILIL48,095-1.0%−0.8 pts

48Ford County, ILIL13,216-1.1%−0.9 pts

49Rock Island County, ILIL141,869-1.2%−1.7 pts

50Randolph County, ILIL29,921-1.2%+0.8 pts

51Putnam County, ILIL5,619-1.3%−7.5 pts

52De Witt County, ILIL15,118-1.4%−3.1 pts

53Bureau County, ILIL32,510-1.5%−1.0 pts

54Christian County, ILIL33,443-1.6%−4.4 pts

55Adams County, ILIL64,267-1.7%−5.0 pts

56Montgomery County, ILIL28,076-1.8%−1.5 pts

57Cumberland County, ILIL10,208-1.8%−7.3 pts

58Livingston County, ILIL35,057-1.8%−2.8 pts

59Hamilton County, ILIL7,859-1.9%−3.3 pts

60Wayne County, ILIL15,882-2.3%−1.8 pts

61Johnson County, ILIL13,363-2.3%−15.8 pts

62Shelby County, ILIL20,576-2.3%−5.2 pts

63Macoupin County, ILIL43,748-2.6%−5.4 pts

64Stephenson County, ILIL43,220-2.6%−4.5 pts

65Union County, ILIL16,656-2.7%−6.5 pts

66Vermilion County, ILIL71,259-2.7%+2.2 pts

67Logan County, ILIL27,182-2.8%−4.1 pts

68Washington County, ILIL13,564-2.9%−4.1 pts

69Morgan County, ILIL32,515-2.9%−3.5 pts

70Jefferson County, ILIL36,147-3.0%−11.2 pts

71Mercer County, ILIL15,229-3.1%−1.2 pts

72Fulton County, ILIL32,901-3.1%−3.5 pts

73Crawford County, ILIL18,648-3.1%−8.2 pts

74Perry County, ILIL20,160-3.2%−11.1 pts

75Scott County, ILIL4,866-3.3%−1.4 pts

76Cook County, ILIL5,194,625-3.4%−8.7 pts

77Macon County, ILIL99,300-3.4%−1.3 pts

78Whiteside County, ILIL54,121-3.6%−4.3 pts

79Edwards County, ILIL5,898-3.6%+2.7 pts

80Clark County, ILIL15,114-4.0%−10.8 pts

81Marshall County, ILIL11,473-4.1%−6.7 pts

82Jasper County, ILIL9,032-4.1%+0.5 pts

83White County, ILIL13,250-4.6%+2.4 pts

84Hancock County, ILIL16,803-5.1%+0.8 pts

85Clay County, ILIL12,793-5.1%−5.8 pts

86Iroquois County, ILIL26,150-5.2%−6.9 pts

87Knox County, ILIL47,767-5.2%−4.2 pts

88Stark County, ILIL5,319-5.3%−2.2 pts

89Marion County, ILIL36,382-5.4%−5.7 pts

90Warren County, ILIL16,222-5.5%−3.2 pts

91Pike County, ILIL14,231-5.5%−4.4 pts

92Edgar County, ILIL16,323-5.7%−6.3 pts

93Greene County, ILIL11,313-5.9%−2.3 pts

94Saline County, ILIL22,772-6.8%−7.5 pts

95Wabash County, ILIL10,907-7.7%−6.3 pts

96Carroll County, ILIL15,419-7.7%−6.9 pts

97Mason County, ILIL12,411-8.6%−7.1 pts

98Hardin County, ILIL3,588-10.0%−2.5 pts

99Henderson County, ILIL5,984-10.7%−12.2 pts

100Gallatin County, ILIL4,616-13.3%−6.6 pts

101Alexander County, ILIL4,570-14.1%−4.3 pts

102Pulaski County, ILIL4,820-16.2%−13.8 pts

SHOWING 1–102 OF 102

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