RANKING · 2020 CENSUS · 115 SHOWN OF 115

Oldest by median age, Missouri counties · 2020

Missouri counties ranked by median age of residents (2020 ACS). This list covers the 115 counties in Missouri that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros ZIP codes

RELATEDLargest foreign-born population Most residents with a disability Largest veteran population Most uninsured people Largest senior population Most unmarried people

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPMEDIAN AGEVS 2000

01Hickory County, MOMO9,04457.2+15%

02Stone County, MOMO32,50354.0+22%

03Benton County, MOMO20,53653.8+16%

04Ozark County, MOMO9,17251.9+19%

05Camden County, MOMO44,04751.6+14%

06Wayne County, MOMO10,78249.3+16%

07Holt County, MOMO4,20048.4+16%

08St. Clair County, MOMO9,97648.4+10%

09Douglas County, MOMO12,34247.8+19%

10Worth County, MOMO1,91447.8+14%

11Dade County, MOMO7,80447.5+14%

12Oregon County, MOMO8,70947.5+16%

13Shannon County, MOMO7,28547.4+22%

14Gasconade County, MOMO14,78446.7+16%

15Reynolds County, MOMO5,99246.7+15%

16Morgan County, MOMO22,41846.4+9%

17Atchison County, MOMO5,17546.1+11%

18Carter County, MOMO5,41846.0+18%

19Chariton County, MOMO7,37746.0+8%

20Iron County, MOMO9,31845.9+16%

21Putnam County, MOMO4,54645.7+9%

22Bollinger County, MOMO10,64645.5+20%

23Monroe County, MOMO8,95945.5+15%

24Ralls County, MOMO10,44445.5+16%

25Maries County, MOMO8,39745.2+17%

26Dent County, MOMO14,58445.1+14%

27Montgomery County, MOMO11,59045.1+14%

28Carroll County, MOMO8,41744.9+12%

29Ripley County, MOMO10,71744.8+14%

30Henry County, MOMO22,67144.7+12%

31Knox County, MOMO3,72844.1+6%

32Ste. Genevieve County, MOMO18,68943.8+16%

33Mercer County, MOMO3,40443.7+3%

34Macon County, MOMO15,19043.6+9%

35Clark County, MOMO6,47543.5+11%

36Caldwell County, MOMO9,01243.5+12%

37Texas County, MOMO25,99443.5+8%

38Crawford County, MOMO22,92943.5+15%

39Cedar County, MOMO14,88843.5+3%

40Barry County, MOMO36,20043.1+13%

41Linn County, MOMO11,81543.1+7%

42Dallas County, MOMO18,02542.9+13%

43Harrison County, MOMO8,28142.8+3%

44New Madrid County, MOMO15,08642.6+14%

45Shelby County, MOMO5,87042.4+5%

46Clinton County, MOMO21,66142.4+12%

47Bates County, MOMO16,51242.3+10%

48Mississippi County, MOMO12,00342.3+13%

49Ray County, MOMO23,39842.3+14%

50Taney County, MOMO57,00142.3+9%

51DeKalb County, MOMO9,79542.2+12%

52Madison County, MOMO12,85842.2+8%

53Stoddard County, MOMO28,28442.2+8%

54Washington County, MOMO23,81042.2+20%

55Perry County, MOMO19,09342.1+14%

56Sullivan County, MOMO5,73842.1+8%

57Franklin County, MOMO108,09041.7+16%

58Lafayette County, MOMO33,53141.7+10%

59Howell County, MOMO40,79841.5+9%

60Livingston County, MOMO14,70841.5+5%

61Miller County, MOMO25,81741.3+11%

62Osage County, MOMO13,61141.3+14%

63Schuyler County, MOMO4,14041.3+1%

64Andrew County, MOMO18,24141.1+9%

65Barton County, MOMO11,79541.1+10%

66Dunklin County, MOMO26,85540.9+8%

67Laclede County, MOMO36,94340.8+11%

68Cooper County, MOMO17,13640.7+16%

69Warren County, MOMO39,01640.7+9%

70Daviess County, MOMO8,55840.6+4%

71Pike County, MOMO17,95540.6+8%

72Wright County, MOMO19,67140.6+8%

73St. Louis County, MOMO990,91140.6+8%

74Butler County, MOMO41,90440.5+5%

75Randolph County, MOMO24,51340.5+9%

76Grundy County, MOMO9,74440.4−2%

77Newton County, MOMO62,26340.4+9%

78Gentry County, MOMO6,38440.3+0%

79Jefferson County, MOMO233,13240.3+15%

80St. Francois County, MOMO67,80940.3+8%

81Cass County, MOMO115,85940.2+12%

82Marion County, MOMO28,52540.1+8%

83Scott County, MOMO37,97540.1+11%

84Vernon County, MOMO19,94640.1+8%

85Lawrence County, MOMO39,40140.0+8%

86Audrain County, MOMO24,52839.9+5%

87Cole County, MOMO77,90839.8+12%

88Callaway County, MOMO45,76539.5+14%

89Lewis County, MOMO9,87939.3+9%

90Polk County, MOMO33,60439.3+12%

91St. Charles County, MOMO426,49939.3+15%

92Buchanan County, MOMO83,54039.1+8%

93Pemiscot County, MOMO14,46539.0+13%

94Moniteau County, MOMO15,42838.9+8%

95Howard County, MOMO10,18038.8+6%

96Platte County, MOMO114,40038.3+7%

97Christian County, MOMO96,72538.1+10%

98Pettis County, MOMO44,25437.9+4%

99McDonald County, MOMO23,99237.8+10%

100Webster County, MOMO43,05437.6+9%

101Cape Girardeau County, MOMO83,99937.4+6%

102Lincoln County, MOMO66,67637.4+8%

103Clay County, MOMO265,03237.3+7%

104Saline County, MOMO23,26536.9−1%

105Jackson County, MOMO732,99436.8+5%

106Greene County, MOMO309,28636.8+5%

107Scotland County, MOMO4,79636.7−2%

108Jasper County, MOMO127,42836.0+3%

109Phelps County, MOMO45,24735.7+2%

110St. Louis, MOMO278,14435.4+5%

111Nodaway County, MOMO20,17433.4+11%

112Johnson County, MOMO56,67032.1+13%

113Boone County, MOMO191,74631.9+8%

114Adair County, MOMO25,68430.5+9%

115Pulaski County, MOMO54,44227.3−4%

SHOWING 1–115 OF 115

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