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New Orleans-Metairie-Slidell, LA-MS Combined Statistical Area Demographics

New Orleans-Metairie-Slidell, LA-MS Combined Statistical Area is the 44th most populous of 184 combined statistical areas in the United States, with 1,373,452 residents across 4,685 square miles. That is about 293 people per square mile.

At the 2020 census

Population 1,373,452
Land area 4,685 sq mi
Density 293 / sq mi

Data: 2020 Census · American Community Survey 2024

How New Orleans-Metairie-Slidell, LA-MS Combined Statistical Area compares to the US

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Central Location: New Orleans-Metairie-Slidell, LA-MS Combined Statistical Area

Measured from the combined statistical area's main population center using 2020 census blocks.

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Counties in the New Orleans-Metairie-Slidell, LA-MS Combined Statistical Area area

Name Population Sq mi Per sq mi
Jefferson Parish, LA 440,780 300.9 1,465
Orleans Parish, LA 383,997 169.5 2,265
St. Tammany Parish 264,570 845.3 313
County Pearl River 56,145 810.9 69
St. Charles Parish 52,549 277.7 189
Washington Parish, LA 45,463 669.6 68
St. Bernard Parish, LA 43,764 377.5 116
St. John the Baptist Parish 42,477 214.5 198
Parish Plaquemines 23,515 779.9 30
Parish St. James 20,192 241.5 84

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About this page

This page shows demographics for a US combined statistical area from the 2020 census and the American Community Survey: population, land area, density, and how the region compares to national averages.

Combined areas are built from whole counties, listed below. Statistics aggregate the member counties' census tracts.

Read how BlockAtlas computes population within an area →