RANKING · 2024 ACS · 115 SHOWN OF 115

Youngest by median age, Missouri counties

Missouri counties with the youngest median age (2024 ACS). This list covers the 115 counties in Missouri that qualify, ranked against each other statewide. The median across all 115 is 41.1. Biggest climber in the top 100 since 2020: Carter County, MO, up 73 places to #24.

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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 2000

01Pulaski County, MOMO54,44227.8−2%

02Adair County, MOMO25,68430.2+8%

03▲1Johnson County, MOMO56,67031.5+11%

04▼1Boone County, MOMO191,74632.7+11%

05Nodaway County, MOMO20,17433.7+12%

06▲6Saline County, MOMO23,26535.3−5%

07Phelps County, MOMO45,24735.8+3%

08▲3Greene County, MOMO309,28636.4+4%

09Scotland County, MOMO4,79636.5−2%

10▼2Jasper County, MOMO127,42836.8+5%

11▼5St. Louis, MOMO278,14436.8+9%

12▼2Jackson County, MOMO732,99437.0+5%

13▲3Webster County, MOMO43,05437.0+7%

14Cape Girardeau County, MOMO83,99937.1+5%

15Lincoln County, MOMO66,67637.5+9%

16▲9Lewis County, MOMO9,87937.6+4%

17▼4Clay County, MOMO265,03237.9+8%

18▲8Polk County, MOMO33,60438.1+9%

19▲4Pemiscot County, MOMO14,46538.1+11%

20▼3McDonald County, MOMO23,99238.2+11%

21▼3Pettis County, MOMO44,25438.2+5%

22Moniteau County, MOMO15,42838.4+7%

23▲8Lawrence County, MOMO39,40138.8+5%

24▲73Carter County, MOMO5,41838.90%

25▼1Buchanan County, MOMO83,54038.9+8%

26▼5Howard County, MOMO10,18039.0+6%

27▼7Platte County, MOMO114,40039.1+9%

28▼9Christian County, MOMO96,72539.2+14%

29▲20Laclede County, MOMO36,94339.2+7%

30▲25Schuyler County, MOMO4,14039.2−4%

31▼3Callaway County, MOMO45,76539.4+14%

32▲9Butler County, MOMO41,90439.5+2%

33▲5St. Francois County, MOMO67,80939.5+6%

34▼2Marion County, MOMO28,52539.6+7%

35▲9Pike County, MOMO17,95539.6+5%

36▲14Dunklin County, MOMO26,85539.7+5%

37▼4Scott County, MOMO37,97539.7+10%

38▲19Livingston County, MOMO14,70839.80%

39▼12St. Charles County, MOMO426,49939.8+16%

40▼11Cole County, MOMO77,90839.9+12%

41▲1Randolph County, MOMO24,51340.0+8%

42▲43Knox County, MOMO3,72840.1−4%

43▼13Audrain County, MOMO24,52840.2+6%

44▼8Gentry County, MOMO6,38440.20%

45▼5Newton County, MOMO62,26340.2+8%

46▼3Daviess County, MOMO8,55840.3+4%

47▲9Howell County, MOMO40,79840.3+5%

48▼11Jefferson County, MOMO233,13240.3+15%

49▼3St. Louis County, MOMO990,91140.3+7%

50▼15Cass County, MOMO115,85940.4+13%

51▼4Cooper County, MOMO17,13640.5+15%

52▼13Grundy County, MOMO9,74440.6−2%

53▲34Ripley County, MOMO10,71740.7+3%

54▲11Washington County, MOMO23,81040.7+16%

55▼7Warren County, MOMO39,01640.8+9%

56▲3Lafayette County, MOMO33,53140.9+8%

57▼5Barton County, MOMO11,79541.1+10%

58▲5Madison County, MOMO12,85841.1+5%

59▲8Mississippi County, MOMO12,00341.1+10%

60▼6Osage County, MOMO13,61141.1+14%

61▼16Wright County, MOMO19,67141.1+9%

62▼9Miller County, MOMO25,81741.3+11%

63▲9New Madrid County, MOMO15,08641.3+10%

64▲2Bates County, MOMO16,51241.4+8%

65▲9Dallas County, MOMO18,02541.7+10%

66▼8Franklin County, MOMO108,09041.8+17%

67▲6Harrison County, MOMO8,28141.80%

68Ray County, MOMO23,39841.9+13%

69▼35Vernon County, MOMO19,94641.9+13%

70▼6Stoddard County, MOMO28,28442.0+7%

71Clinton County, MOMO21,66142.0+11%

72▲4Linn County, MOMO11,81542.1+4%

73▼11DeKalb County, MOMO9,79542.2+12%

74▼14Perry County, MOMO19,09342.2+15%

75▲8Mercer County, MOMO3,40442.40%

76▼25Andrew County, MOMO18,24142.5+12%

77▼8Taney County, MOMO57,00142.6+10%

78▼8Shelby County, MOMO5,87042.7+6%

79Texas County, MOMO25,99442.9+6%

80Crawford County, MOMO22,92943.0+13%

81Cedar County, MOMO14,88843.0+2%

82▼4Caldwell County, MOMO9,01243.2+11%

83▲1Ste. Genevieve County, MOMO18,68943.3+15%

84▼9Barry County, MOMO36,20043.4+14%

85▼8Clark County, MOMO6,47543.5+11%

86▲3Dent County, MOMO14,58443.5+10%

87▼5Macon County, MOMO15,19043.5+8%

88Carroll County, MOMO8,41743.6+9%

89▲1Montgomery County, MOMO11,59043.6+11%

90▼4Henry County, MOMO22,67143.7+9%

91▼30Sullivan County, MOMO5,73844.1+13%

92Bollinger County, MOMO10,64644.5+17%

93▲12Oregon County, MOMO8,70944.5+9%

94▲4Chariton County, MOMO7,37744.7+5%

95▲1Iron County, MOMO9,31844.8+13%

96▼5Maries County, MOMO8,39744.9+17%

97▲6Shannon County, MOMO7,28544.9+16%

98▲2Morgan County, MOMO22,41845.4+7%

99▲7Douglas County, MOMO12,34245.5+13%

100▼7Monroe County, MOMO8,95945.7+16%

101▼6Putnam County, MOMO4,54645.9+10%

102▼8Ralls County, MOMO10,44445.9+17%

103▼1Reynolds County, MOMO5,99246.1+13%

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

105▼6Atchison County, MOMO5,17546.7+12%

106▼5Gasconade County, MOMO14,78446.8+16%

107▼3Dade County, MOMO7,80447.0+13%

108Holt County, MOMO4,20047.4+13%

109▼2Worth County, MOMO1,91448.5+16%

110Wayne County, MOMO10,78248.6+14%

111▲1Ozark County, MOMO9,17251.4+18%

112▼1Camden 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 2026-09-11 · DATA: US CENSUS BUREAU ACS 5-YEAR ESTIMATES