Missouri Population By County in 2012

Updated on January 27, 2024.

Based on the US Census Vintage data estimates, in 2012, the population of Missouri was 6,026,027. Among all Missouri counties, St. Louis had the highest population (1,000,975), followed by Jackson (677,570), and St. Charles (369,175). Worth was the least populated county (2,080).

Hover over or click on the counties in the map below to see the populations. The data can also be found in a table below. You can use the table to sort, filter, and explore the data further.

You can see similar information for other states and by state for the United States.

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Missouri Population By County in 2012
Missouri Population By County in 2012
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County Population % of State Population
Adair 25696 0.43
Andrew 17311 0.29
Atchison 5512 0.09
Audrain 25539 0.42
Barry 35334 0.59
Barton 12299 0.20
Bates 16615 0.28
Benton 19006 0.32
Bollinger 12447 0.21
Boone 168868 2.80
Buchanan 89962 1.49
Butler 43001 0.71
Caldwell 9085 0.15
Callaway 44413 0.74
Camden 44232 0.73
Cape Girardeau 77076 1.28
Carroll 9076 0.15
Carter 6271 0.10
Cass 100458 1.67
Cedar 13910 0.23
Chariton 7680 0.13
Christian 79695 1.32
Clark 6968 0.12
Clay 227636 3.78
Clinton 20560 0.34
Cole 76480 1.27
Cooper 17538 0.29
Crawford 24783 0.41
Dade 7556 0.13
Dallas 16703 0.28
Daviess 8294 0.14
DeKalb 12783 0.21
Dent 15659 0.26
Douglas 13582 0.23
Dunklin 31848 0.53
Franklin 101331 1.68
Gasconade 14914 0.25
Gentry 6767 0.11
Greene 280550 4.66
Grundy 10333 0.17
Harrison 8731 0.14
Henry 22228 0.37
Hickory 9444 0.16
Holt 4679 0.08
Howard 10198 0.17
Howell 40533 0.67
Iron 10544 0.18
Jackson 677570 11.24
Jasper 115813 1.92
Jefferson 219885 3.65
Johnson 54335 0.90
Knox 4091 0.07
Laclede 35490 0.59
Lafayette 33061 0.55
Lawrence 38384 0.64
Lewis 10116 0.17
Lincoln 53267 0.88
Linn 12489 0.21
Livingston 14997 0.25
McDonald 22976 0.38
Macon 15550 0.26
Madison 12376 0.21
Maries 9020 0.15
Marion 28753 0.48
Mercer 3708 0.06
Miller 24573 0.41
Mississippi 14288 0.24
Moniteau 15674 0.26
Monroe 8691 0.14
Montgomery 11971 0.20
Morgan 20079 0.33
New Madrid 18468 0.31
Newton 58651 0.97
Nodaway 23336 0.39
Oregon 10973 0.18
Osage 13848 0.23
Ozark 9600 0.16
Pemiscot 18081 0.30
Perry 18991 0.32
Pettis 42299 0.70
Phelps 45248 0.75
Pike 18554 0.31
Platte 92203 1.53
Polk 31088 0.52
Pulaski 53521 0.89
Putnam 4948 0.08
Ralls 10230 0.17
Randolph 25337 0.42
Ray 23081 0.38
Reynolds 6549 0.11
Ripley 14032 0.23
St. Charles 369175 6.13
St. Clair 9533 0.16
Ste. Genevieve 17867 0.30
St. Francois 65811 1.09
St. Louis 1000975 16.61
Saline 23547 0.39
Schuyler 4391 0.07
Scotland 4872 0.08
Scott 39177 0.65
Shannon 8333 0.14
Shelby 6213 0.10
Stoddard 29816 0.50
Stone 31908 0.53
Sullivan 6557 0.11
Taney 52928 0.88
Texas 25799 0.43
Vernon 20937 0.35
Warren 32746 0.54
Washington 25088 0.42
Wayne 13409 0.22
Webster 36451 0.61
Worth 2080 0.04
Wright 18557 0.31
St. Louis city 319534 5.30