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.

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