RANKING · 2010 CENSUS · 101 SHOWN OF 101

Newest housing stock, Illinois counties · 2010

Illinois counties ranked by median year housing was built (2010 ACS). This list covers the 101 counties in Illinois that qualify, ranked against each other statewide. The median across all 101 is 1963.

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SAME RANKING BYCities States Metros ZIP codes

YEAR1990 2010 2020 2024

RANKPLACESTATEPOPMEDIAN YEAR BUILTVS 1990

01Kendall County, ILIL145,4701998+1%

02Will County, ILIL712,2531990+1%

03McHenry County, ILIL317,7511986+1%

04Monroe County, ILIL34,8401985+1%

05Grundy County, ILIL54,0521982+1%

06Boone County, ILIL53,5681980+1%

07Lake County, ILIL719,3391979+1%

08Kane County, ILIL525,7571978+1%

09DuPage County, ILIL934,29819770%

10Johnson County, ILIL13,36319770%

11McLean County, ILIL171,4191977+1%

12DeKalb County, ILIL101,8351975+1%

13Champaign County, ILIL209,97219740%

14Effingham County, ILIL34,51919740%

15Jefferson County, ILIL36,1471973+1%

16Pope County, ILIL3,6721973+1%

17Williamson County, ILIL67,2251973+1%

18Sangamon County, ILIL194,1701972+1%

19Clinton County, ILIL37,12819720%

20Jackson County, ILIL52,50119720%

21Menard County, ILIL11,8631972+1%

22Cumberland County, ILIL10,20819710%

23Jersey County, ILIL21,16019710%

24Kankakee County, ILIL105,5251971+1%

25Massac County, ILIL13,5021971+1%

26Jo Daviess County, ILIL21,5941970+1%

27Union County, ILIL16,65619700%

28Woodford County, ILIL38,1111970+1%

29Calhoun County, ILIL4,3001969+1%

30St. Clair County, ILIL250,70819690%

31Jasper County, ILIL9,03219690%

32Bond County, ILIL16,95919680%

33Marion County, ILIL36,38219680%

34Putnam County, ILIL5,61919680%

35Coles County, ILIL46,60719670%

36Gallatin County, ILIL4,61619670%

37Wayne County, ILIL15,88219670%

38Winnebago County, ILIL283,67419670%

39Clay County, ILIL12,79319660%

40Madison County, ILIL263,11019660%

41Ogle County, ILIL51,39919660%

42Richland County, ILIL15,21919660%

43Saline County, ILIL22,77219650%

44Hardin County, ILIL3,58819650%

45Macoupin County, ILIL43,7481965+1%

46Piatt County, ILIL16,79119650%

47Randolph County, ILIL29,92119650%

48Tazewell County, ILIL130,04919650%

49Perry County, ILIL20,16019640%

50Washington County, ILIL13,56419640%

51Douglas County, ILIL19,88019630%

52McDonough County, ILIL25,91619630%

53Pulaski County, ILIL4,82019630%

54Henderson County, ILIL5,98419620%

55Edwards County, ILIL5,89819620%

56Franklin County, ILIL36,91619610%

57Macon County, ILIL99,30019610%

58Mason County, ILIL12,41119610%

59Morgan County, ILIL32,51519610%

60Moultrie County, ILIL14,37119610%

61Peoria County, ILIL178,55319610%

62Scott County, ILIL4,8661961+1%

63Clark County, ILIL15,11419600%

64Fayette County, ILIL20,79019600%

65Hamilton County, ILIL7,85919600%

66Marshall County, ILIL11,47319600%

67Wabash County, ILIL10,90719600%

68Lawrence County, ILIL13,79019590%

69Adams County, ILIL64,26719590%

70Shelby County, ILIL20,57619590%

71Whiteside County, ILIL54,12119590%

72Rock Island County, ILIL141,86919580%

73Alexander County, ILIL4,57019580%

74Brown County, ILIL6,4011958+1%

75Henry County, ILIL48,09519580%

76LaSalle County, ILIL107,77319580%

77Livingston County, ILIL35,05719580%

78Montgomery County, ILIL28,07619580%

79Schuyler County, ILIL6,65719580%

80White County, ILIL13,25019580%

81Cook County, ILIL5,194,62519570%

82Crawford County, ILIL18,64819570%

83Christian County, ILIL33,44319570%

84De Witt County, ILIL15,11819570%

85Pike County, ILIL14,23119570%

86Stephenson County, ILIL43,22019570%

87Iroquois County, ILIL26,15019560%

88Logan County, ILIL27,18219560%

89Vermilion County, ILIL71,25919560%

90Edgar County, ILIL16,32319550%

91Greene County, ILIL11,31319550%

92Knox County, ILIL47,76719550%

93Lee County, ILIL32,91419550%

94Carroll County, ILIL15,4191954+1%

95Fulton County, ILIL32,90119540%

96Hancock County, ILIL16,80319540%

97Mercer County, ILIL15,22919540%

98Cass County, ILIL12,46319530%

99Ford County, ILIL13,21619520%

100Warren County, ILIL16,22219510%

101Bureau County, ILIL32,5101950+1%

SHOWING 1–101 OF 101

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU DECENNIAL CENSUS