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What are the largest counties in Louisiana?

East Baton Rouge Parish is the largest county in Louisiana, with 456,180 residents in 2025 (Census PEP). Jefferson Parish (431,398) and Orleans Parish (362,154) come next.

Data as of 2025 · updated

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All 64 Louisiana counties ranked

Louisiana counties ranked by population
RankCountyResidents 2025Change 2020–25
1East Baton Rouge Parish456,180+0.1%
2Jefferson Parish431,398−1.9%
3Orleans Parish362,154−5.5%
4St. Tammany Parish279,108+5.3%
5Lafayette Parish257,949+6.5%
6Caddo Parish224,226−5.4%
7Calcasieu Parish208,466−3.7%
8Ouachita Parish158,542−1.0%
9Livingston Parish155,036+8.5%
10Tangipahoa Parish141,346+5.8%
11Ascension Parish135,105+6.4%
12Bossier Parish131,867+2.5%
13Rapides Parish125,877−2.9%
14Terrebonne Parish104,163−4.8%
15Lafourche Parish95,505−2.0%
16St. Landry Parish80,765−1.9%
17Iberia Parish66,846−4.6%
18Vermilion Parish57,671+1.3%
19Acadia Parish57,032−0.8%
20St. Martin Parish51,106−1.0%
21St. Charles Parish50,586−3.7%
22Lincoln Parish48,360+0.1%
23St. Mary Parish46,552−5.3%
24St. Bernard Parish45,642+4.1%
25Vernon Parish45,091−7.3%
26Washington Parish44,937−0.9%
27St. John the Baptist Parish39,875−5.9%
28Avoyelles Parish37,941−4.3%
29Beauregard Parish36,673+0.2%
30Natchitoches Parish36,089−3.5%
31Webster Parish34,948−5.2%
32Evangeline Parish31,980−1.0%
33Jefferson Davis Parish31,471−2.4%
34Iberville Parish29,579−1.6%
35West Baton Rouge Parish28,756+5.5%
36De Soto Parish27,381+2.0%
37Morehouse Parish23,705−6.9%
38Allen Parish22,672+0.0%
39Plaquemines Parish22,256−5.3%
40Grant Parish22,075−0.3%
41Sabine Parish21,834−1.2%
42Union Parish20,561−2.5%
43Assumption Parish19,720−5.9%
44Richland Parish19,582−2.2%
45Pointe Coupee Parish19,520−5.6%
46Franklin Parish19,002−3.6%
47St. James Parish18,938−5.9%
48East Feliciana Parish18,911−2.8%
49Concordia Parish17,836−4.0%
50Jackson Parish15,834+5.6%
51LaSalle Parish15,154+2.2%
52West Feliciana Parish15,134−0.7%
53Winn Parish14,961+9.0%
54Claiborne Parish13,354−5.3%
55Bienville Parish12,269−5.0%
56St. Helena Parish10,758−1.2%
57Caldwell Parish9,344−2.8%
58West Carroll Parish9,156−5.5%
59Madison Parish8,844−10.9%
60Catahoula Parish8,223−7.0%
61Red River Parish7,165−5.5%
62East Carroll Parish6,760−8.6%
63Cameron Parish4,718−16.1%
64Tensas Parish3,700−9.9%

How this is ranked

The Census Bureau's July 1 resident population estimates for 2025, largest first, with the change since 2020. Counties with fewer than 1,000 residents are not ranked. Areas without an estimate for the same year as the others are not ranked.

Source: U.S. Census Bureau, Population Estimates Program (Vintage 2025). Figures come from public federal statistics and are informational only, not investment advice. Check the source before relying on a number. Methodology: how ranks and figures are built.

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Questions

What is the largest county in Louisiana?

East Baton Rouge Parish is the largest county in Louisiana, with 456,180 residents in 2025 (Census PEP). Jefferson Parish (431,398) and Orleans Parish (362,154) come next.

How is this ranking calculated?

The Census Bureau's July 1 resident population estimates for 2025, largest first, with the change since 2020. Counties with fewer than 1,000 residents are not ranked. Areas without an estimate for the same year as the others are not ranked.

More rankings for Louisiana

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