RANKING · 2020 CENSUS · 115 SHOWN OF 115

Largest by population, Missouri counties · 2020

The most populous Missouri counties as of the 2020 population estimates. This list covers the 115 counties in Missouri that qualify, ranked against each other statewide.

MissouriAll states All rankings

SAME RANKING BYCities States Metros ZIP codes

RELATEDFastest growing Fastest shrinking Most population gained Most population lost Most densely populated Most sparsely populated

YEAR1990 2000 2010 2020 2025

RANKPLACESTATETOTAL POPULATIONVS 2000

01St. Louis County, MOMO1,004,125−1%

02Jackson County, MOMO717,204+10%

03St. Charles County, MOMO405,262+43%

04St. Louis, MOMO301,578−13%

05Greene County, MOMO298,915+24%

06Clay County, MOMO253,335+38%

07Jefferson County, MOMO226,739+14%

08Boone County, MOMO183,610+36%

09Jasper County, MOMO122,761+17%

10Cass County, MOMO107,824+31%

11Platte County, MOMO106,718+45%

12Franklin County, MOMO104,682+12%

13Christian County, MOMO88,842+64%

14Buchanan County, MOMO84,793−1%

15Cape Girardeau County, MOMO81,710+19%

16Cole County, MOMO77,279+8%

17St. Francois County, MOMO66,922+20%

18Lincoln County, MOMO59,574+53%

19Newton County, MOMO58,648+11%

20Taney County, MOMO56,066+41%

21Johnson County, MOMO54,013+12%

22Pulaski County, MOMO53,955+31%

23Phelps County, MOMO44,638+12%

24Callaway County, MOMO44,283+9%

25Pettis County, MOMO42,980+9%

26Camden County, MOMO42,745+15%

27Butler County, MOMO42,130+3%

28Howell County, MOMO39,750+7%

29Webster County, MOMO39,085+26%

30Scott County, MOMO38,059−6%

31Lawrence County, MOMO38,001+8%

32Laclede County, MOMO36,039+11%

33Warren County, MOMO35,532+45%

34Barry County, MOMO34,534+2%

35Lafayette County, MOMO32,984+0%

36Polk County, MOMO31,519+17%

37Stone County, MOMO31,076+8%

38Stoddard County, MOMO28,672−3%

39Marion County, MOMO28,525+1%

40Dunklin County, MOMO28,283−15%

41Adair County, MOMO25,314+1%

42Audrain County, MOMO24,962−3%

43Miller County, MOMO24,722+5%

44Randolph County, MOMO24,716+0%

45Texas County, MOMO24,487+6%

46Washington County, MOMO23,514+1%

47Saline County, MOMO23,333−2%

48McDonald County, MOMO23,303+7%

49Ray County, MOMO23,158−1%

50Crawford County, MOMO23,056+1%

51Henry County, MOMO21,946−0%

52Nodaway County, MOMO21,241−3%

53Clinton County, MOMO21,184+12%

54Morgan County, MOMO21,006+9%

55Vernon County, MOMO19,707−4%

56Benton County, MOMO19,394+13%

57Perry County, MOMO18,956+5%

58Ste. Genevieve County, MOMO18,479+4%

59Wright County, MOMO18,188+1%

60Andrew County, MOMO18,135+10%

61Pike County, MOMO17,587−4%

62Cooper County, MOMO17,103+3%

63Dallas County, MOMO17,071+9%

64New Madrid County, MOMO16,434−17%

65Bates County, MOMO16,042−4%

66Pemiscot County, MOMO15,661−22%

67Moniteau County, MOMO15,473+4%

68Macon County, MOMO15,209−4%

69Gasconade County, MOMO14,794−4%

70Livingston County, MOMO14,557−0%

71Dent County, MOMO14,421−3%

72Cedar County, MOMO14,188+3%

73Osage County, MOMO13,274+2%

74Madison County, MOMO12,626+7%

75Mississippi County, MOMO12,577−6%

76Linn County, MOMO11,874−14%

77Barton County, MOMO11,637−7%

78Douglas County, MOMO11,578−12%

79Montgomery County, MOMO11,322−7%

80DeKalb County, MOMO11,029−5%

81Wayne County, MOMO10,974−17%

82Ripley County, MOMO10,679−21%

83Bollinger County, MOMO10,567−12%

84Ralls County, MOMO10,355+8%

85Howard County, MOMO10,151−1%

86Lewis County, MOMO10,032−4%

87Grundy County, MOMO9,808−6%

88Iron County, MOMO9,537−11%

89St. Clair County, MOMO9,284−4%

90Caldwell County, MOMO8,815−2%

91Monroe County, MOMO8,666−7%

92Oregon County, MOMO8,635−17%

93Ozark County, MOMO8,553−10%

94Carroll County, MOMO8,495−17%

95Maries County, MOMO8,432−5%

96Daviess County, MOMO8,430+5%

97Hickory County, MOMO8,279−7%

98Harrison County, MOMO8,157−8%

99Dade County, MOMO7,569−4%

100Chariton County, MOMO7,408−12%

101Shannon County, MOMO7,031−16%

102Clark County, MOMO6,634−11%

103Gentry County, MOMO6,162−10%

104Shelby County, MOMO6,103−10%

105Reynolds County, MOMO6,096−9%

106Sullivan County, MOMO5,999−17%

107Atchison County, MOMO5,305−17%

108Carter County, MOMO5,202−12%

109Scotland County, MOMO4,716−5%

110Putnam County, MOMO4,681−10%

111Holt County, MOMO4,223−21%

112Schuyler County, MOMO4,032−3%

113Knox County, MOMO3,744−14%

114Mercer County, MOMO3,538−6%

115Worth County, MOMO1,973−17%

SHOWING 1–115 OF 115

Download CSV (full list, 115 rows)

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