RANKING · 1990 CENSUS · 115 SHOWN OF 115

Oldest by median age, Missouri counties · 1990

Missouri counties ranked by median age of residents (1990 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 –

01Hickory County, MOMO9,04450.8–

02Benton County, MOMO20,53644.6–

03Mercer County, MOMO3,40442.9–

04Worth County, MOMO1,91442.8–

05Stone County, MOMO32,50342.6–

06St. Clair County, MOMO9,97642.3–

07Harrison County, MOMO8,28142.3–

08Sullivan County, MOMO5,73842.2–

09Putnam County, MOMO4,54642.2–

10Morgan County, MOMO22,41842.1–

11Cedar County, MOMO14,88842.0–

12Ozark County, MOMO9,17241.8–

13Camden County, MOMO44,04741.6–

14Knox County, MOMO3,72841.0–

15Oregon County, MOMO8,70940.7–

16Taney County, MOMO57,00140.5–

17Wayne County, MOMO10,78240.1–

18Gentry County, MOMO6,38439.8–

19Grundy County, MOMO9,74439.5–

20Shelby County, MOMO5,87039.5–

21Linn County, MOMO11,81539.0–

22Schuyler County, MOMO4,14038.9–

23Chariton County, MOMO7,37738.9–

24Scotland County, MOMO4,79638.9–

25Dade County, MOMO7,80438.7–

26Macon County, MOMO15,19038.4–

27Holt County, MOMO4,20038.4–

28Henry County, MOMO22,67138.3–

29Carroll County, MOMO8,41738.2–

30Atchison County, MOMO5,17538.1–

31Gasconade County, MOMO14,78438.0–

32Barry County, MOMO36,20037.6–

33Dent County, MOMO14,58437.6–

34Daviess County, MOMO8,55837.5–

35Caldwell County, MOMO9,01237.5–

36Bates County, MOMO16,51237.3–

37Iron County, MOMO9,31837.3–

38Douglas County, MOMO12,34237.2–

39Audrain County, MOMO24,52837.1–

40Reynolds County, MOMO5,99237.1–

41Livingston County, MOMO14,70837.1–

42Montgomery County, MOMO11,59037.0–

43Ripley County, MOMO10,71737.0–

44Stoddard County, MOMO28,28436.8–

45Dallas County, MOMO18,02536.6–

46Ralls County, MOMO10,44436.6–

47Maries County, MOMO8,39736.6–

48Madison County, MOMO12,85836.6–

49Texas County, MOMO25,99436.5–

50Barton County, MOMO11,79536.4–

51Howell County, MOMO40,79836.4–

52Dunklin County, MOMO26,85536.1–

53Bollinger County, MOMO10,64636.0–

54Monroe County, MOMO8,95936.0–

55Clark County, MOMO6,47535.9–

56Butler County, MOMO41,90435.8–

57Pike County, MOMO17,95535.8–

58Carter County, MOMO5,41835.8–

59Shannon County, MOMO7,28535.7–

60Lawrence County, MOMO39,40135.6–

61Vernon County, MOMO19,94635.6–

62Crawford County, MOMO22,92935.5–

63Saline County, MOMO23,26535.4–

64Lafayette County, MOMO33,53135.4–

65Andrew County, MOMO18,24135.2–

66Howard County, MOMO10,18035.1–

67Wright County, MOMO19,67135.1–

68Clinton County, MOMO21,66135.1–

69Marion County, MOMO28,52534.8–

70Pettis County, MOMO44,25434.7–

71St. Louis County, MOMO990,91134.7–

72Newton County, MOMO62,26334.6–

73Perry County, MOMO19,09334.5–

74Randolph County, MOMO24,51334.5–

75St. Francois County, MOMO67,80934.4–

76Laclede County, MOMO36,94334.3–

77Moniteau County, MOMO15,42834.2–

78Jasper County, MOMO127,42834.2–

79Miller County, MOMO25,81734.1–

80Ray County, MOMO23,39834.1–

81Cooper County, MOMO17,13634.1–

82Lewis County, MOMO9,87934.1–

83Buchanan County, MOMO83,54034.1–

84Mississippi County, MOMO12,00334.1–

85McDonald County, MOMO23,99234.0–

86Ste. Genevieve County, MOMO18,68933.9–

87Warren County, MOMO39,01633.7–

88DeKalb County, MOMO9,79533.6–

89New Madrid County, MOMO15,08633.5–

90Polk County, MOMO33,60433.4–

91Scott County, MOMO37,97533.2–

92Jackson County, MOMO732,99433.2–

93Clay County, MOMO265,03232.9–

94St. Louis, MOMO278,14432.9–

95Cole County, MOMO77,90832.8–

96Platte County, MOMO114,40032.8–

97Webster County, MOMO43,05432.8–

98Christian County, MOMO96,72532.7–

99Greene County, MOMO309,28632.6–

100Callaway County, MOMO45,76532.6–

101Pemiscot County, MOMO14,46532.6–

102Franklin County, MOMO108,09032.3–

103Osage County, MOMO13,61132.3–

104Cass County, MOMO115,85932.3–

105Cape Girardeau County, MOMO83,99932.2–

106Washington County, MOMO23,81031.9–

107Phelps County, MOMO45,24731.9–

108Lincoln County, MOMO66,67631.8–

109Jefferson County, MOMO233,13230.7–

110St. Charles County, MOMO426,49930.7–

111Nodaway County, MOMO20,17428.1–

112Boone County, MOMO191,74627.8–

113Adair County, MOMO25,68427.3–

114Pulaski County, MOMO54,44227.0–

115Johnson County, MOMO56,67026.2–

SHOWING 1–115 OF 115

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