Missouri Citizen Population By County in 2020 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2020, the citizen population for Missouri was 5,996,705 and represented 97.92% of the total Missouri population.

Among all Missouri counties, St. Louis had the highest citizen population (963.04K), followed by Jackson (677.74K), and St. Charles (391.13K).

In terms of percentages, Carter had the highest percentage of its population being citizens (100.00%), followed by Hickory (100.00%), and Worth (100.00%).

The chart and table below shows the citizen population of each county and the percentage of each county's population that were citizens.

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

You may also be interested in:
Missouri Citizen Voting-age Population By County in 2020

Data Source: US Census - ACS 5-Year (CVAP).

See this for other years:

Missouri Citizen Population By County in 2020

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County	Citizen Population	% of County Population
St. Louis	963040	96.67
Jackson	677735	96.72
St. Charles	391125	98.16
St. Louis city	292880	96.12
Greene	287070	98.46
Clay	241565	98.01
Jefferson	223450	99.41
Boone	172105	95.77
Jasper	116995	97.07
Cass	103860	99.21
Franklin	102800	99.20
Platte	100610	97.82
Buchanan	86145	98.00
Christian	86115	98.61
Cape Girardeau	77240	97.98
Cole	75530	98.57
St. Francois	66090	99.15
Lincoln	57420	99.71
Newton	57170	98.08
Taney	54885	98.78
Johnson	53065	98.36
Pulaski	51070	97.54
Camden	45340	98.94
Callaway	44695	99.44
Phelps	43040	96.54
Butler	42375	99.54
Pettis	40560	95.62
Howell	39870	99.35
Webster	38935	99.51
Scott	38325	99.44
Lawrence	37490	98.04
Laclede	35565	99.68
Warren	34995	99.73
Barry	34855	97.87
Lafayette	32530	99.50
Polk	31915	99.64
Stone	31665	99.34
Stoddard	29195	99.80
Dunklin	28935	97.57
Marion	28440	99.55
Texas	25505	99.94
Miller	25175	99.23
Audrain	25080	98.99
Washington	24745	99.70
Randolph	24670	99.60
Adair	24570	96.47
Crawford	23900	99.65
Ray	22855	99.80
Saline	22165	96.66
Nodaway	21910	98.69
Henry	21635	98.99
McDonald	21320	93.18
Vernon	20460	99.51
Clinton	20415	99.56
Morgan	20380	99.71
Benton	19210	99.51
Perry	19045	99.06
Wright	18230	99.86
Pike	18100	99.67
Ste. Genevieve	17835	99.72
Andrew	17500	99.69
Cooper	17455	99.63
New Madrid	17210	99.62
Dallas	16700	99.17
Pemiscot	16260	99.57
Bates	16255	99.85
Moniteau	15795	99.31
Dent	15420	99.36
Macon	15045	99.27
Livingston	14870	99.33
Gasconade	14655	99.86
Cedar	14065	99.43
Osage	13610	99.96
Ripley	13465	99.85
Douglas	13250	99.36
Mississippi	13200	99.03
Wayne	13045	99.89
Bollinger	12175	99.96
Madison	12165	99.92
Linn	11970	99.71
DeKalb	11820	99.58
Barton	11640	99.23
Montgomery	11310	99.08
Oregon	10540	99.81
Ralls	10250	99.90
Iron	10140	99.90
Howard	10000	99.80
Lewis	9845	99.44
Grundy	9710	98.23
Hickory	9450	100.00
St. Clair	9425	99.68
Ozark	9125	99.84
Caldwell	9010	99.56
Carroll	8680	99.48
Maries	8665	98.58
Monroe	8605	99.71
Harrison	8355	99.17
Daviess	8235	99.28
Shannon	8195	99.88
Dade	7545	99.67
Chariton	7425	99.66
Clark	6735	99.26
Gentry	6525	99.24
Reynolds	6265	99.84
Carter	6085	100.00
Shelby	5970	99.92
Sullivan	5950	96.51
Atchison	5175	99.90
Scotland	4885	99.19
Putnam	4735	99.79
Schuyler	4535	99.67
Holt	4365	99.77
Knox	3925	99.37
Mercer	3580	98.76
Worth	2000	100.00