RANKING · 2024 ACS · 102 SHOWN OF 102

Oldest housing stock, Illinois counties

Illinois counties ranked by oldest median year of construction (2024 ACS). This list covers the 102 counties in Illinois that qualify, ranked against each other statewide. The median across all 102 is 1970. Biggest climber in the top 100 since 2020: Brown County, IL, up 30 places to #11.

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SAME RANKING BYCities States Metros ZIP codes

RELATEDMost expensive homes Cheapest homes Highest median rent Lowest median rent Highest homeownership rate Highest renter share

YEAR1990 2010 2020 2024

RANKPLACESTATEPOPMEDIAN YEAR BUILTVS 1990

01▲2Ford County, ILIL13,21619550%

02▲2Stark County, ILIL5,3191956+1%

03▼1Warren County, ILIL16,22219560%

04▲5Carroll County, ILIL15,4191957+1%

05▼4Greene County, ILIL11,31319570%

06▲1Knox County, ILIL47,76719570%

07▼2Vermilion County, ILIL71,25919570%

08▼2Bureau County, ILIL32,5101958+1%

09▲21De Witt County, ILIL15,11819580%

10▲14Mason County, ILIL12,41119590%

11▲30Brown County, ILIL6,4011960+1%

12▲3Fulton County, ILIL32,9011960+1%

13▲7Iroquois County, ILIL26,15019600%

14▲2Lee County, ILIL32,9141960+1%

15▼3Stephenson County, ILIL43,22019600%

16▼3Cook County, ILIL5,194,62519610%

17▲2Henry County, ILIL48,09519610%

18▼7Livingston County, ILIL35,05719610%

19▲13Marshall County, ILIL11,47319610%

20▲5Pike County, ILIL14,2311961+1%

21▲5Whiteside County, ILIL54,12119610%

22▼4Rock Island County, ILIL141,86919620%

23▼13Mercer County, ILIL15,2291962+1%

24▼2White County, ILIL13,25019620%

25▼8Lawrence County, ILIL13,7901963+1%

26▲1Christian County, ILIL33,4431963+1%

27▲17Franklin County, ILIL36,9161963+1%

28▼5LaSalle County, ILIL107,7731963+1%

29▼21Scott County, ILIL4,8661963+1%

30▼16Edgar County, ILIL16,3231964+1%

31▼3Hancock County, ILIL16,8031964+1%

32▼11Logan County, ILIL27,18219640%

33▼2Macon County, ILIL99,30019640%

34▼1Montgomery County, ILIL28,0761964+1%

35▼6Crawford County, ILIL18,6481965+1%

36▲1Adams County, ILIL64,2671965+1%

37▲10McDonough County, ILIL25,91619650%

38▲1Morgan County, ILIL32,51519650%

39▼1Macoupin County, ILIL43,7481966+1%

40▼4Peoria County, ILIL178,5531966+1%

41▲10Shelby County, ILIL20,57619660%

42▲11Douglas County, ILIL19,8801967+1%

43▲2Calhoun County, ILIL4,3001968+1%

44▼10Cass County, ILIL12,4631968+1%

45▲13Moultrie County, ILIL14,3711968+1%

46▲3Alexander County, ILIL4,57019690%

47▲21Gallatin County, ILIL4,61619690%

48▲2Pulaski County, ILIL4,82019690%

49▼1Tazewell County, ILIL130,04919690%

50▲6Cumberland County, ILIL10,20819700%

51▼8Edwards County, ILIL5,8981970+1%

52▲5Hamilton County, ILIL7,8591970+1%

53▼13Wabash County, ILIL10,9071970+1%

54▲1Coles County, ILIL46,6071971+1%

55▼3Saline County, ILIL22,7721971+1%

56▼14Clark County, ILIL15,1141971+1%

57▼3Madison County, ILIL263,1101971+1%

58▲7Schuyler County, ILIL6,6571971+1%

59▲1Winnebago County, ILIL283,6741971+1%

60▲1Henderson County, ILIL5,9841972+1%

61▲6Clay County, ILIL12,7931972+1%

62▼27Fayette County, ILIL20,7901972+1%

63▼1Kankakee County, ILIL105,5251972+1%

64▼5Ogle County, ILIL51,3991972+1%

65▼2Randolph County, ILIL29,9211972+1%

66▲6Washington County, ILIL13,5641972+1%

67▲14Woodford County, ILIL38,1111972+1%

68▲1Marion County, ILIL36,3821973+1%

69▲1Perry County, ILIL20,1601973+1%

70▲1Piatt County, ILIL16,7911973+1%

71▼7Richland County, ILIL15,2191973+1%

72▼6Sangamon County, ILIL194,1701974+1%

73▼27Hardin County, ILIL3,5881974+1%

74▼1Wayne County, ILIL15,8821974+1%

75▼1St. Clair County, ILIL250,7081975+1%

76▼1Bond County, ILIL16,9591975+1%

77▼1Jasper County, ILIL9,0321975+1%

78▲5Jersey County, ILIL21,1601975+1%

79▲7Massac County, ILIL13,5021975+1%

80▼1Putnam County, ILIL5,6191975+1%

81▼1Union County, ILIL16,6561975+1%

82▲3Jackson County, ILIL52,50119760%

83▼6Jo Daviess County, ILIL21,5941976+1%

84▼6Menard County, ILIL11,8631976+1%

85▼1Clinton County, ILIL37,1281977+1%

86▼4Jefferson County, ILIL36,1471977+1%

87▲2DuPage County, ILIL934,29819780%

88▼1DeKalb County, ILIL101,8351978+1%

89▼1Effingham County, ILIL34,5191978+1%

90▲1Champaign County, ILIL209,9721981+1%

91▲1McLean County, ILIL171,4191981+1%

92▲2Williamson County, ILIL67,2251981+1%

93▲2Lake County, ILIL719,3391983+1%

94▲2Kane County, ILIL525,7571985+1%

95▼2Johnson County, ILIL13,3631985+1%

96▲2Boone County, ILIL53,5681986+1%

97▼7Pope County, ILIL3,6721986+1%

98▲2McHenry County, ILIL317,7511989+1%

99Monroe County, ILIL34,8401990+1%

100▼3Grundy County, ILIL54,0521990+1%

101Will County, ILIL712,2531992+1%

102Kendall County, ILIL145,4702001+2%

SHOWING 1–102 OF 102

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UPDATED 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES