Louisiana Citizen Population By County in 2021 (ACS-5Yrs)

Updated on March 28, 2026.

Based on the US Census Bureau's special tabulation from the ACS 5-year estimates, in 2021, the citizen population for Louisiana was 4,543,050 and represented 97.55% of the total Louisiana population.

Among all Louisiana counties, East Baton Rouge had the highest citizen population (439.33K), followed by Jefferson (405.13K), and Orleans (373.83K).

In terms of percentages, East Carroll had the highest percentage of its population being citizens (100.00%), followed by Caldwell (99.95%), and Catahoula (99.95%).

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:
Louisiana Citizen Voting-age Population By County in 2021

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

See this for other years:

Louisiana Citizen Population By County in 2021

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County	Citizen Population	% of County Population
East Baton Rouge	439325	96.46
Jefferson	405125	92.20
Orleans	373830	97.36
St. Tammany	256395	97.56
Caddo	237215	98.93
Lafayette	233655	96.88
Calcasieu	208405	98.01
Ouachita	158985	99.23
Livingston	138195	97.97
Tangipahoa	130580	98.56
Rapides	128815	98.74
Bossier	126065	98.10
Ascension	122175	97.51
Terrebonne	108445	98.50
Lafourche	96120	98.41
St. Landry	82210	99.05
Iberia	69265	98.22
Acadia	57725	99.18
Vermilion	57225	99.05
St. Martin	51680	98.97
St. Charles	51465	98.20
St. Mary	48565	97.48
Vernon	48400	98.65
Lincoln	47520	98.15
Washington	45535	99.43
St. Bernard	43000	98.13
St. John the Baptist	42110	98.61
Avoyelles	39690	99.52
Natchitoches	37815	99.79
Webster	37195	99.57
Beauregard	36055	99.01
Jefferson Davis	32120	99.54
Evangeline	31400	96.50
Iberville	30315	98.91
West Baton Rouge	26960	99.61
De Soto	26725	99.70
Morehouse	25795	99.79
Plaquemines	23190	98.53
Sabine	22325	99.78
Allen	21735	94.15
Grant	21570	97.01
Assumption	21310	99.74
Union	21120	99.30
Pointe Coupee	20855	99.55
St. James	20240	99.26
Richland	20095	99.93
Franklin	19890	99.62
East Feliciana	19545	99.77
Concordia	18605	97.97
Jackson	15095	99.21
West Feliciana	15065	98.24
LaSalle	14565	98.61
Claiborne	14355	99.31
Winn	13790	99.39
Bienville	12975	98.82
St. Helena	10705	98.39
Madison	10235	99.42
West Carroll	9910	99.50
Caldwell	9700	99.95
Catahoula	9110	99.95
Red River	7780	99.94
East Carroll	7500	100.00
Cameron	5440	96.28
Tensas	4265	99.88