RANKING · 2010 CENSUS · 102 SHOWN OF 102

Most population lost, Illinois counties · 2010

Illinois counties that lost the most residents from the 2000 census to 2010, by raw count of people rather than percentage. This list covers the 102 counties in Illinois that qualify, ranked against each other statewide.

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IllinoisAll states All rankings

SAME RANKING BYCities States Metros

YEAR2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION CHANGEVS 2000

01Cook County, ILIL5,194,625-182,066−167%

02Macon County, ILIL99,300-3,938+58%

03Knox County, ILIL47,767-2,917+424%

04Vermilion County, ILIL71,259-2,294−47%

05Marion County, ILIL36,382-2,254−1834%

06Whiteside County, ILIL54,121-2,155−561%

07Rock Island County, ILIL141,869-1,828−381%

08Saline County, ILIL22,772-1,820−1100%

09Iroquois County, ILIL26,150-1,616−395%

10Mason County, ILIL12,411-1,372+494%

11Alexander County, ILIL4,570-1,352+31%

12Carroll County, ILIL15,419-1,287+882%

13Stephenson County, ILIL43,220-1,268−237%

14Macoupin County, ILIL43,748-1,254−194%

15Jefferson County, ILIL36,147-1,218−140%

16Pulaski County, ILIL4,820-1,187+578%

17Fulton County, ILIL32,901-1,181−795%

18Adams County, ILIL64,267-1,174−154%

19Edgar County, ILIL16,323-1,128−1135%

20Morgan County, ILIL32,515-1,069−588%

21Warren County, ILIL16,222-1,028+130%

22Hancock County, ILIL16,803-1,017−19%

23Wabash County, ILIL10,907-990+469%

24Pike County, ILIL14,231-954+394%

25Henderson County, ILIL5,984-882−854%

26Logan County, ILIL27,182-878−328%

27Greene County, ILIL11,313-875+57%

28Gallatin County, ILIL4,616-856+84%

29Clay County, ILIL12,793-745−845%

30Perry County, ILIL20,160-744−144%

31Livingston County, ILIL35,057-728−293%

32White County, ILIL13,250-706−39%

33Clark County, ILIL15,114-673−162%

34Crawford County, ILIL18,648-635−164%

35Christian County, ILIL33,443-572−160%

36Montgomery County, ILIL28,076-548+621%

37Marshall County, ILIL11,473-540−262%

38Henry County, ILIL48,095-534+284%

39Shelby County, ILIL20,576-530−184%

40Bureau County, ILIL32,510-525+184%

41Mercer County, ILIL15,229-523+57%

42Union County, ILIL16,656-485−172%

43Hardin County, ILIL3,588-480+23%

44Washington County, ILIL13,564-432−336%

45Jasper County, ILIL9,032-419−15%

46Randolph County, ILIL29,921-417−40%

47Wayne County, ILIL15,882-391+334%

48Stark County, ILIL5,319-338+67%

49McDonough County, ILIL25,916-301−87%

50Johnson County, ILIL13,363-296−119%

51Edwards County, ILIL5,898-250−47%

52De Witt County, ILIL15,118-237−184%

53Cumberland County, ILIL10,208-205−135%

54Scott County, ILIL4,866-182+70%

55Hamilton County, ILIL7,859-164−234%

56Ford County, ILIL13,216-160+371%

57Putnam County, ILIL5,619-80−122%

58Cass County, ILIL12,463-53−121%

59Lee County, ILIL32,914-31−102%

60Effingham County, ILIL34,519-22−101%

61Brown County, ILIL6,401-13−101%

62Calhoun County, ILIL4,300+5−102%

63Pope County, ILIL3,672+57+43%

64Douglas County, ILIL19,880+58−87%

65Richland County, ILIL15,219+84−121%

66Bond County, ILIL16,959+135−95%

67Menard County, ILIL11,863+219−83%

68Massac County, ILIL13,502+268−34%

69Fayette County, ILIL20,790+338−63%

70Schuyler County, ILIL6,657+355−215%

71Piatt County, ILIL16,791+364−55%

72Jo Daviess County, ILIL21,594+389−17%

73Franklin County, ILIL36,916+543−142%

74Moultrie County, ILIL14,371+559+57%

75Jackson County, ILIL52,501+606−142%

76Coles County, ILIL46,607+677−56%

77Jersey County, ILIL21,160+1,317+17%

78Lawrence County, ILIL13,790+1,381−366%

79Clinton County, ILIL37,128+2,227+40%

80LaSalle County, ILIL107,773+2,415−47%

81Ogle County, ILIL51,399+2,465−51%

82Peoria County, ILIL178,553+3,061+405%

83Woodford County, ILIL38,111+3,195+13%

84Williamson County, ILIL67,225+5,061+42%

85Monroe County, ILIL34,840+5,338+3%

86Tazewell County, ILIL130,049+6,909+44%

87Sangamon County, ILIL194,170+8,514−19%

88Kankakee County, ILIL105,525+9,616+27%

89Madison County, ILIL263,110+10,341+7%

90Boone County, ILIL53,568+12,379+13%

91Grundy County, ILIL54,052+12,528+141%

92DuPage County, ILIL934,298+12,763−90%

93St. Clair County, ILIL250,708+13,974−306%

94DeKalb County, ILIL101,835+16,191+47%

95Winnebago County, ILIL283,674+16,848−34%

96McLean County, ILIL171,419+19,139−10%

97Champaign County, ILIL209,972+21,412+222%

98McHenry County, ILIL317,751+48,683−37%

99Lake County, ILIL719,339+59,106−54%

100Kendall County, ILIL145,470+60,192+298%

101Kane County, ILIL525,757+111,150+28%

102Will County, ILIL712,253+175,294+21%

SHOWING 1–102 OF 102

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