RANKING · 2020 CENSUS · 115 SHOWN OF 115

Most densely populated, Missouri counties · 2020

Missouri counties ranked by residents per square mile (2023). This list covers the 115 counties in Missouri that qualify, ranked against each other statewide.

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SAME RANKING BYCities States Metros

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YEAR1990 2000 2010 2020 2025

RANKPLACESTATEPOPPOPULATION DENSITYVS 2000

01St. Louis, MOMO278,1444,886−13%

02St. Louis County, MOMO990,9111,977−1%

03Jackson County, MOMO732,9941,186+10%

04St. Charles County, MOMO426,499723+43%

05Clay County, MOMO265,032637+38%

06Greene County, MOMO309,286443+24%

07Jefferson County, MOMO233,132346+14%

08Boone County, MOMO191,746268+36%

09Platte County, MOMO114,400254+45%

10Buchanan County, MOMO83,540208−1%

11Cole County, MOMO77,908197+8%

12Jasper County, MOMO127,428192+17%

13Christian County, MOMO96,725158+64%

14Cass County, MOMO115,859155+31%

15St. Francois County, MOMO67,809148+20%

16Cape Girardeau County, MOMO83,999141+19%

17Franklin County, MOMO108,090113+12%

18Pulaski County, MOMO54,44299+31%

19Lincoln County, MOMO66,67695+53%

20Newton County, MOMO62,26394+11%

21Scott County, MOMO37,97591−6%

22Taney County, MOMO57,00189+41%

23Warren County, MOMO39,01683+45%

24Stone County, MOMO32,50367+8%

25Phelps County, MOMO45,24766+12%

26Webster County, MOMO43,05466+26%

27Marion County, MOMO28,52565+1%

28Camden County, MOMO44,04765+15%

29Johnson County, MOMO56,67065+12%

30Pettis County, MOMO44,25463+9%

31Lawrence County, MOMO39,40162+8%

32Butler County, MOMO41,90461+3%

33Callaway County, MOMO45,76553+9%

34Lafayette County, MOMO33,53152+0%

35Dunklin County, MOMO26,85552−15%

36Randolph County, MOMO24,51351+0%

37Clinton County, MOMO21,66151+12%

38Polk County, MOMO33,60450+17%

39Laclede County, MOMO36,94347+11%

40Adair County, MOMO25,68445+1%

41Barry County, MOMO36,20044+2%

42McDonald County, MOMO23,99243+7%

43Howell County, MOMO40,79843+7%

44Andrew County, MOMO18,24142+10%

45Miller County, MOMO25,81742+5%

46Ray County, MOMO23,39841−1%

47Perry County, MOMO19,09340+5%

48Moniteau County, MOMO15,42837+4%

49Ste. Genevieve County, MOMO18,68937+4%

50Audrain County, MOMO24,52836−3%

51Morgan County, MOMO22,41835+9%

52Stoddard County, MOMO28,28435−3%

53Pemiscot County, MOMO14,46532−22%

54Dallas County, MOMO18,02532+9%

55Henry County, MOMO22,67131−0%

56Crawford County, MOMO22,92931+1%

57Washington County, MOMO23,81031+1%

58Saline County, MOMO23,26531−2%

59Mississippi County, MOMO12,00331−6%

60Cooper County, MOMO17,13630+3%

61Cedar County, MOMO14,88830+3%

62Gasconade County, MOMO14,78429−4%

63Benton County, MOMO20,53628+13%

64Livingston County, MOMO14,70827−0%

65Wright County, MOMO19,67127+1%

66Pike County, MOMO17,95526−4%

67DeKalb County, MOMO9,79526−5%

68Madison County, MOMO12,85826+7%

69New Madrid County, MOMO15,08624−17%

70Nodaway County, MOMO20,17424−3%

71Vernon County, MOMO19,94624−4%

72Grundy County, MOMO9,74423−6%

73Ralls County, MOMO10,44422+8%

74Howard County, MOMO10,18022−1%

75Osage County, MOMO13,61122+2%

76Montgomery County, MOMO11,59021−7%

77Texas County, MOMO25,99421+6%

78Hickory County, MOMO9,04421−7%

79Caldwell County, MOMO9,01221−2%

80Lewis County, MOMO9,87920−4%

81Barton County, MOMO11,79520−7%

82Linn County, MOMO11,81519−14%

83Bates County, MOMO16,51219−4%

84Dent County, MOMO14,58419−3%

85Macon County, MOMO15,19019−4%

86Iron County, MOMO9,31817−11%

87Bollinger County, MOMO10,64617−12%

88Ripley County, MOMO10,71717−21%

89Maries County, MOMO8,39716−5%

90Dade County, MOMO7,80415−4%

91Daviess County, MOMO8,55815+5%

92Wayne County, MOMO10,78214−17%

93Douglas County, MOMO12,34214−12%

94St. Clair County, MOMO9,97614−4%

95Monroe County, MOMO8,95913−7%

96Clark County, MOMO6,47513−11%

97Schuyler County, MOMO4,14013−3%

98Gentry County, MOMO6,38413−10%

99Carroll County, MOMO8,41712−17%

100Shelby County, MOMO5,87012−10%

101Ozark County, MOMO9,17211−10%

102Harrison County, MOMO8,28111−8%

103Oregon County, MOMO8,70911−17%

104Scotland County, MOMO4,79611−5%

105Carter County, MOMO5,41810−12%

106Chariton County, MOMO7,37710−12%

107Atchison County, MOMO5,17510−17%

108Sullivan County, MOMO5,7389−17%

109Holt County, MOMO4,2009−21%

110Putnam County, MOMO4,5469−10%

111Mercer County, MOMO3,4048−6%

112Reynolds County, MOMO5,9928−9%

113Knox County, MOMO3,7287−14%

114Worth County, MOMO1,9147−17%

115Shannon County, MOMO7,2857−16%

SHOWING 1–115 OF 115

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