Louisiana Population By County in 2015

Updated on June 16, 2025.

Based on the US Census Vintage data estimates, in 2015, the population of Louisiana was 4,666,998. Among all Louisiana counties, East Baton Rouge had the highest population (445,776), followed by Jefferson (435,358), and Orleans (390,094).

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.

Related Topics: Louisiana Census Vintage Data Topic List.

Data Source: US Census Bureau (Vintage).

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Louisiana Population By County in 2015

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County	Population	% of State Population
Acadia	62696	1.34
Allen	25630	0.55
Ascension	119417	2.56
Assumption	22902	0.49
Avoyelles	40992	0.88
Beauregard	36557	0.78
Bienville	13828	0.30
Bossier	125634	2.69
Caddo	251499	5.39
Calcasieu	198542	4.25
Caldwell	10048	0.22
Cameron	6821	0.15
Catahoula	10034	0.22
Claiborne	16271	0.35
Concordia	20233	0.43
De Soto	27112	0.58
East Baton Rouge	445776	9.55
East Carroll	7279	0.16
East Feliciana	19534	0.42
Evangeline	33728	0.72
Franklin	20397	0.44
Grant	22327	0.48
Iberia	73548	1.58
Iberville	33149	0.71
Jackson	15971	0.34
Jefferson	435358	9.33
Jefferson Davis	31449	0.67
Lafayette	239654	5.14
Lafourche	98279	2.11
LaSalle	14975	0.32
Lincoln	47469	1.02
Livingston	137202	2.94
Madison	11560	0.25
Morehouse	26307	0.56
Natchitoches	39018	0.84
Orleans	390094	8.36
Ouachita	156916	3.36
Plaquemines	23462	0.50
Pointe Coupee	22197	0.48
Rapides	131821	2.83
Red River	8710	0.19
Richland	20552	0.44
Sabine	24213	0.52
St. Bernard	45436	0.97
St. Charles	52587	1.13
St. Helena	10465	0.22
St. James	21483	0.46
St. John the Baptist	43527	0.93
St. Landry	83693	1.79
St. Martin	53891	1.16
St. Mary	52908	1.13
St. Tammany	249116	5.34
Tangipahoa	128774	2.76
Tensas	4773	0.10
Terrebonne	113894	2.44
Union	22490	0.48
Vermilion	59928	1.28
Vernon	51535	1.10
Washington	46365	0.99
Webster	40067	0.86
West Baton Rouge	25596	0.55
West Carroll	11287	0.24
West Feliciana	15376	0.33
Winn	14646	0.31