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. The median across all 115 is 41.7.

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SAME RANKING BYCities States Metros ZIP codes

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, MOMO6,38440.30%

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