RANKING · 2010 CENSUS · 115 SHOWN OF 115

Youngest by median age, Missouri counties · 2010

Missouri counties with the youngest median age (2023 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

RELATEDOldest by median age Most foreign-born residents Highest uninsured rate Most women Most men Highest disability rate

YEAR1990 2000 2010 2020 2024

RANKPLACESTATEPOPMEDIAN AGEVS 2000

01Pulaski County, MOMO54,44226.6−7%

02Adair County, MOMO25,68428.3+1%

03Nodaway County, MOMO20,17428.5−6%

04Boone County, MOMO191,74629.6+0%

05Johnson County, MOMO56,67029.8+5%

06Phelps County, MOMO45,24733.8−3%

07St. Louis, MOMO278,14433.9+1%

08Jasper County, MOMO127,42835.1+1%

09Lincoln County, MOMO66,67635.6+3%

10Greene County, MOMO309,28635.8+2%

11Jackson County, MOMO732,99436.2+3%

12Clay County, MOMO265,03236.2+3%

13Christian County, MOMO96,72536.3+5%

14Cape Girardeau County, MOMO83,99936.4+3%

15McDonald County, MOMO23,99236.5+6%

16Buchanan County, MOMO83,54036.9+2%

17St. Charles County, MOMO426,49936.9+8%

18Pemiscot County, MOMO14,46537.0+8%

19Pettis County, MOMO44,25437.1+2%

20Webster County, MOMO43,05437.5+8%

21Cole County, MOMO77,90837.7+6%

22Callaway County, MOMO45,76537.7+9%

23Jefferson County, MOMO233,13237.8+8%

24Moniteau County, MOMO15,42837.8+5%

25Polk County, MOMO33,60437.8+8%

26Cass County, MOMO115,85937.9+6%

27Randolph County, MOMO24,51338.0+2%

28St. Francois County, MOMO67,80938.2+3%

29Saline County, MOMO23,26538.2+3%

30Platte County, MOMO114,40038.4+7%

31Audrain County, MOMO24,52838.5+1%

32Cooper County, MOMO17,13638.7+10%

33Lewis County, MOMO9,87938.7+8%

34Scott County, MOMO37,97538.9+8%

35Marion County, MOMO28,52539.0+5%

36Newton County, MOMO62,26339.0+5%

37Lawrence County, MOMO39,40139.1+6%

38Scotland County, MOMO4,79639.1+5%

39Howard County, MOMO10,18039.2+7%

40Perry County, MOMO19,09339.2+7%

41Washington County, MOMO23,81039.2+11%

42Dunklin County, MOMO26,85539.3+4%

43Laclede County, MOMO36,94339.3+7%

44Osage County, MOMO13,61139.3+9%

45Franklin County, MOMO108,09039.4+10%

46Mississippi County, MOMO12,00339.4+6%

47Warren County, MOMO39,01639.5+6%

48Howell County, MOMO40,79839.6+4%

49DeKalb County, MOMO9,79539.9+6%

50Pike County, MOMO17,95539.9+6%

51St. Louis County, MOMO990,91139.9+6%

52Vernon County, MOMO19,94640.0+8%

53Daviess County, MOMO8,55840.1+3%

54Miller County, MOMO25,81740.2+8%

55Barton County, MOMO11,79540.3+8%

56New Madrid County, MOMO15,08640.4+8%

57Butler County, MOMO41,90440.6+5%

58Ray County, MOMO23,39840.6+9%

59Crawford County, MOMO22,92940.6+7%

60Lafayette County, MOMO33,53140.6+7%

61Taney County, MOMO57,00140.7+5%

62Wright County, MOMO19,67140.7+8%

63Sullivan County, MOMO5,73840.8+5%

64Clinton County, MOMO21,66140.8+8%

65Andrew County, MOMO18,24141.0+8%

66Madison County, MOMO12,85841.0+5%

67Livingston County, MOMO14,70841.1+4%

68Stoddard County, MOMO28,28441.1+5%

69Carter County, MOMO5,41841.2+6%

70Bates County, MOMO16,51241.3+8%

71Caldwell County, MOMO9,01241.3+6%

72Schuyler County, MOMO4,14041.3+1%

73Dallas County, MOMO18,02541.4+9%

74Grundy County, MOMO9,74441.6+1%

75Barry County, MOMO36,20041.8+9%

76Bollinger County, MOMO10,64642.0+11%

77Carroll County, MOMO8,41742.1+5%

78Ripley County, MOMO10,71742.1+7%

79Texas County, MOMO25,99442.1+4%

80Linn County, MOMO11,81542.2+5%

81Clark County, MOMO6,47542.3+8%

82Macon County, MOMO15,19042.3+5%

83Shelby County, MOMO5,87042.3+5%

84Gentry County, MOMO6,38442.4+5%

85Harrison County, MOMO8,28142.6+2%

86Ste. Genevieve County, MOMO18,68942.6+13%

87Iron County, MOMO9,31842.7+8%

88Maries County, MOMO8,39742.8+11%

89Dent County, MOMO14,58443.0+9%

90Montgomery County, MOMO11,59043.2+10%

91Ralls County, MOMO10,44443.4+10%

92Shannon County, MOMO7,28543.4+12%

93Henry County, MOMO22,67143.5+9%

94Mercer County, MOMO3,40443.5+3%

95Knox County, MOMO3,72843.6+5%

96Monroe County, MOMO8,95943.8+11%

97Reynolds County, MOMO5,99244.6+10%

98Cedar County, MOMO14,88844.9+6%

99Douglas County, MOMO12,34245.0+12%

100Gasconade County, MOMO14,78445.0+12%

101Putnam County, MOMO4,54645.1+8%

102Oregon County, MOMO8,70945.4+11%

103Chariton County, MOMO7,37745.8+8%

104Wayne County, MOMO10,78245.8+8%

105Dade County, MOMO7,80445.9+10%

106Morgan County, MOMO22,41846.1+8%

107Atchison County, MOMO5,17546.2+11%

108Holt County, MOMO4,20046.6+11%

109Worth County, MOMO1,91447.4+13%

110St. Clair County, MOMO9,97648.1+10%

111Camden County, MOMO44,04748.6+8%

112Ozark County, MOMO9,17248.9+12%

113Stone County, MOMO32,50349.9+13%

114Benton County, MOMO20,53651.5+11%

115Hickory County, MOMO9,04453.0+7%

SHOWING 1–115 OF 115

Download CSV (full list, 115 rows)

UPDATED 2026-06-02 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES