RANKING · 2024 ACS · 115 SHOWN OF 115

Youngest by median age, Missouri counties

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, MOMO54,44227.8−2%

02Adair County, MOMO25,68430.2+8%

03Johnson County, MOMO56,67031.5+11%

04Boone County, MOMO191,74632.7+11%

05Nodaway County, MOMO20,17433.7+12%

06Saline County, MOMO23,26535.3−5%

07Phelps County, MOMO45,24735.8+3%

08Greene County, MOMO309,28636.4+4%

09Scotland County, MOMO4,79636.5−2%

10Jasper County, MOMO127,42836.8+5%

11St. Louis, MOMO278,14436.8+9%

12Jackson County, MOMO732,99437.0+5%

13Webster County, MOMO43,05437.0+7%

14Cape Girardeau County, MOMO83,99937.1+5%

15Lincoln County, MOMO66,67637.5+9%

16Lewis County, MOMO9,87937.6+4%

17Clay County, MOMO265,03237.9+8%

18Polk County, MOMO33,60438.1+9%

19Pemiscot County, MOMO14,46538.1+11%

20McDonald County, MOMO23,99238.2+11%

21Pettis County, MOMO44,25438.2+5%

22Moniteau County, MOMO15,42838.4+7%

23Lawrence County, MOMO39,40138.8+5%

24Carter County, MOMO5,41838.9+0%

25Buchanan County, MOMO83,54038.9+8%

26Howard County, MOMO10,18039.0+6%

27Platte County, MOMO114,40039.1+9%

28Christian County, MOMO96,72539.2+14%

29Laclede County, MOMO36,94339.2+7%

30Schuyler County, MOMO4,14039.2−4%

31Callaway County, MOMO45,76539.4+14%

32Butler County, MOMO41,90439.5+2%

33St. Francois County, MOMO67,80939.5+6%

34Marion County, MOMO28,52539.6+7%

35Pike County, MOMO17,95539.6+5%

36Dunklin County, MOMO26,85539.7+5%

37Scott County, MOMO37,97539.7+10%

38Livingston County, MOMO14,70839.8+0%

39St. Charles County, MOMO426,49939.8+16%

40Cole County, MOMO77,90839.9+12%

41Randolph County, MOMO24,51340.0+8%

42Knox County, MOMO3,72840.1−4%

43Audrain County, MOMO24,52840.2+6%

44Gentry County, MOMO6,38440.2+0%

45Newton County, MOMO62,26340.2+8%

46Daviess County, MOMO8,55840.3+4%

47Howell County, MOMO40,79840.3+5%

48Jefferson County, MOMO233,13240.3+15%

49St. Louis County, MOMO990,91140.3+7%

50Cass County, MOMO115,85940.4+13%

51Cooper County, MOMO17,13640.5+15%

52Grundy County, MOMO9,74440.6−2%

53Ripley County, MOMO10,71740.7+3%

54Washington County, MOMO23,81040.7+16%

55Warren County, MOMO39,01640.8+9%

56Lafayette County, MOMO33,53140.9+8%

57Barton County, MOMO11,79541.1+10%

58Madison County, MOMO12,85841.1+5%

59Mississippi County, MOMO12,00341.1+10%

60Osage County, MOMO13,61141.1+14%

61Wright County, MOMO19,67141.1+9%

62Miller County, MOMO25,81741.3+11%

63New Madrid County, MOMO15,08641.3+10%

64Bates County, MOMO16,51241.4+8%

65Dallas County, MOMO18,02541.7+10%

66Franklin County, MOMO108,09041.8+17%

67Harrison County, MOMO8,28141.8+0%

68Ray County, MOMO23,39841.9+13%

69Vernon County, MOMO19,94641.9+13%

70Stoddard County, MOMO28,28442.0+7%

71Clinton County, MOMO21,66142.0+11%

72Linn County, MOMO11,81542.1+4%

73DeKalb County, MOMO9,79542.2+12%

74Perry County, MOMO19,09342.2+15%

75Mercer County, MOMO3,40442.4+0%

76Andrew County, MOMO18,24142.5+12%

77Taney County, MOMO57,00142.6+10%

78Shelby County, MOMO5,87042.7+6%

79Texas County, MOMO25,99442.9+6%

80Crawford County, MOMO22,92943.0+13%

81Cedar County, MOMO14,88843.0+2%

82Caldwell County, MOMO9,01243.2+11%

83Ste. Genevieve County, MOMO18,68943.3+15%

84Barry County, MOMO36,20043.4+14%

85Clark County, MOMO6,47543.5+11%

86Dent County, MOMO14,58443.5+10%

87Macon County, MOMO15,19043.5+8%

88Carroll County, MOMO8,41743.6+9%

89Montgomery County, MOMO11,59043.6+11%

90Henry County, MOMO22,67143.7+9%

91Sullivan County, MOMO5,73844.1+13%

92Bollinger County, MOMO10,64644.5+17%

93Oregon County, MOMO8,70944.5+9%

94Chariton County, MOMO7,37744.7+5%

95Iron County, MOMO9,31844.8+13%

96Maries County, MOMO8,39744.9+17%

97Shannon County, MOMO7,28544.9+16%

98Morgan County, MOMO22,41845.4+7%

99Douglas County, MOMO12,34245.5+13%

100Monroe County, MOMO8,95945.7+16%

101Putnam County, MOMO4,54645.9+10%

102Ralls County, MOMO10,44445.9+17%

103Reynolds County, MOMO5,99246.1+13%

104St. Clair County, MOMO9,97646.1+5%

105Atchison County, MOMO5,17546.7+12%

106Gasconade County, MOMO14,78446.8+16%

107Dade County, MOMO7,80447.0+13%

108Holt County, MOMO4,20047.4+13%

109Worth County, MOMO1,91448.5+16%

110Wayne County, MOMO10,78248.6+14%

111Ozark County, MOMO9,17251.4+18%

112Camden County, MOMO44,04753.2+18%

113Benton County, MOMO20,53654.5+18%

114Stone County, MOMO32,50354.6+24%

115Hickory County, MOMO9,04455.2+11%

SHOWING 1–115 OF 115

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