RANKING · 2000 CENSUS · 115 SHOWN OF 115

Youngest by median age, Missouri counties · 2000

Missouri counties with the youngest median age (2000 ACS). This list covers the 115 counties in Missouri that qualify, ranked against each other statewide. The median across all 115 is 37.8.

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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 1990

01Adair County, MOMO25,68427.9+2%

02Johnson County, MOMO56,67028.5+9%

03Pulaski County, MOMO54,44228.5+6%

04Boone County, MOMO191,74629.5+6%

05Nodaway County, MOMO20,17430.2+8%

06St. Louis, MOMO278,14433.7+3%

07McDonald County, MOMO23,99234.3+1%

08St. Charles County, MOMO426,49934.3+12%

09Pemiscot County, MOMO14,46534.4+6%

10Christian County, MOMO96,72534.5+6%

11Lincoln County, MOMO66,67634.5+9%

12Webster County, MOMO43,05434.6+5%

13Callaway County, MOMO45,76534.7+6%

14Jasper County, MOMO127,42834.9+2%

15Jefferson County, MOMO233,13234.9+14%

16Phelps County, MOMO45,24734.9+9%

17Polk County, MOMO33,60435.0+5%

18Clay County, MOMO265,03235.0+6%

19Greene County, MOMO309,28635.1+8%

20Cape Girardeau County, MOMO83,99935.2+9%

21Cooper County, MOMO17,13635.2+3%

22Jackson County, MOMO732,99435.2+6%

23Washington County, MOMO23,81035.2+10%

24Cole County, MOMO77,90835.5+8%

25Cass County, MOMO115,85935.8+11%

26Franklin County, MOMO108,09035.8+11%

27Moniteau County, MOMO15,42835.9+5%

28Platte County, MOMO114,40035.9+9%

29Lewis County, MOMO9,87936.0+6%

30Scott County, MOMO37,97536.0+8%

31Buchanan County, MOMO83,54036.1+6%

32Osage County, MOMO13,61136.1+12%

33Pettis County, MOMO44,25436.4+5%

34Laclede County, MOMO36,94336.6+7%

35Howard County, MOMO10,18036.7+4%

36Perry County, MOMO19,09336.8+7%

37Lawrence County, MOMO39,40136.9+4%

38Marion County, MOMO28,52537.1+7%

39Ray County, MOMO23,39837.1+9%

40Newton County, MOMO62,26337.1+7%

41Vernon County, MOMO19,94637.1+4%

42Miller County, MOMO25,81737.2+9%

43St. Francois County, MOMO67,80937.2+8%

44Saline County, MOMO23,26537.2+5%

45Randolph County, MOMO24,51337.2+8%

46Barton County, MOMO11,79537.3+2%

47Mississippi County, MOMO12,00337.3+9%

48Scotland County, MOMO4,79637.4−4%

49Warren County, MOMO39,01637.4+11%

50New Madrid County, MOMO15,08637.4+12%

51St. Louis County, MOMO990,91137.5+8%

52DeKalb County, MOMO9,79537.7+12%

53Pike County, MOMO17,95537.7+5%

54Ste. Genevieve County, MOMO18,68937.7+11%

55Wright County, MOMO19,67137.7+7%

56Clinton County, MOMO21,66137.7+7%

57Andrew County, MOMO18,24137.8+7%

58Dunklin County, MOMO26,85537.8+5%

59Dallas County, MOMO18,02537.9+3%

60Bollinger County, MOMO10,64637.9+5%

61Crawford County, MOMO22,92937.9+7%

62Lafayette County, MOMO33,53137.9+7%

63Audrain County, MOMO24,52838.0+2%

64Barry County, MOMO36,20038.2+2%

65Howell County, MOMO40,79838.2+5%

66Bates County, MOMO16,51238.4+3%

67Maries County, MOMO8,39738.5+5%

68Butler County, MOMO41,90438.7+8%

69Caldwell County, MOMO9,01238.8+3%

70Shannon County, MOMO7,28538.8+9%

71Taney County, MOMO57,00138.8−4%

72Carter County, MOMO5,41838.9+9%

73Daviess County, MOMO8,55838.9+4%

74Sullivan County, MOMO5,73838.9−8%

75Madison County, MOMO12,85839.1+7%

76Stoddard County, MOMO28,28439.1+6%

77Clark County, MOMO6,47539.2+9%

78Ralls County, MOMO10,44439.3+7%

79Monroe County, MOMO8,95939.4+10%

80Montgomery County, MOMO11,59039.4+6%

81Ripley County, MOMO10,71739.4+7%

82Dent County, MOMO14,58439.6+5%

83Iron County, MOMO9,31839.7+7%

84Livingston County, MOMO14,70839.7+7%

85Carroll County, MOMO8,41740.0+5%

86Henry County, MOMO22,67140.0+4%

87Douglas County, MOMO12,34240.1+8%

88Macon County, MOMO15,19040.1+4%

89Gentry County, MOMO6,38440.2+1%

90Gasconade County, MOMO14,78440.3+6%

91Linn County, MOMO11,81540.3+3%

92Shelby County, MOMO5,87040.4+2%

93Texas County, MOMO25,99440.4+11%

94Reynolds County, MOMO5,99240.7+10%

95Schuyler County, MOMO4,14040.8+5%

96Oregon County, MOMO8,70941.0+1%

97Grundy County, MOMO9,74441.3+5%

98Knox County, MOMO3,72841.6+1%

99Dade County, MOMO7,80441.7+8%

100Atchison County, MOMO5,17541.7+9%

101Harrison County, MOMO8,28141.7−2%

102Holt County, MOMO4,20041.8+9%

103Putnam County, MOMO4,54641.9−1%

104Worth County, MOMO1,91441.9−2%

105Cedar County, MOMO14,88842.2+1%

106Mercer County, MOMO3,40442.4−1%

107Chariton County, MOMO7,37742.5+9%

108Wayne County, MOMO10,78242.5+6%

109Morgan County, MOMO22,41842.6+1%

110Ozark County, MOMO9,17243.6+4%

111St. Clair County, MOMO9,97643.9+4%

112Stone County, MOMO32,50344.1+3%

113Camden County, MOMO44,04745.2+9%

114Benton County, MOMO20,53646.3+4%

115Hickory County, MOMO9,04449.7−2%

SHOWING 1–115 OF 115

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