Assumption Parish, Louisiana

Assumption Parish: Parish in Louisiana, United States


Assumption Parish is a county located in the U.S. state of Louisiana. As of the 2010 census, the population was 23,421 and a population density of 25 people per km². After 10 years in 2020 county had an estimated population of 21,621 inhabitants. Its county seat is Napoleonville. The county was created 217 years ago in 1807.

Assumption Parish locator map
Location of Assumption Parish on Louisiana map.

Quick Facts about Assumption Parish

Population : 21,621 (2020)
Country : United States of America
State : Louisiana (United States)
Area : 944 km2
Water as percent of area : 7.1%
Land as percent of area : 92.9%
Named for : Assumption of Mary
Altitude : 3 feet / 1 meters
Capital : Napoleonville
Establishment : March 03, 1807
Time Zone : America/Chicago
Local time : 07:01:07 (13th July 2024)
Density : 23 Pop. per km² as of 2020
Population growth : -8.33% (2010-2020)
StAnneNapWM image
StAnneNapWM image


Assumption Parish is located at 29°54'3"N 91°3'45"W (29.9007700, -91.0625900). It has 7 neighbors: Ascension Parish, Iberia Parish, Iberville Parish, Lafourche Parish, Saint James Parish, Saint Martin Parish and Terrebonne Parish.

Assumption Parish map

Assumption Parish Populated Places

Cities, towns, neighborhoods & other populated places in Assumption Parish.

City Name Population Title
Pierre Part 3,169 City in Louisiana, United States of America
Belle Rose 1,902 City in Louisiana, United States of America
Labadieville 1,854 City in Louisiana, United States of America
Supreme 1,052 Human settlement in Louisiana, United States of America
Rosedale 729 Village in Louisiana, United States
Napoleonville 575 Town

Assumption Parish has 7 neighbours.

  • Napoleonville


According to census records, the population of Assumption Parish decreased by 8.33% in 10 years.

Year Population % Change Method
2010 23,421 - census
2011 23,185 -1.02% estimation process
2012 23,072 -0.49% estimation process
2013 23,199 0.55% estimation process
2014 23,047 -0.66% estimation process
2015 22,898 -0.65% estimation process
2016 22,756 -0.62% estimation process
2017 22,568 -0.83% estimation process
2018 22,279 -1.3% estimation process
2019 21,891 -1.77% estimation process
2020 21,621 -1.25% estimation process

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People born in Assumption Parish (1)

United States federal judge Charlton Reid Beattie was born in Assumption Parish

Louisiana Other Counties (more counties)

County Name Population Title
East Baton Rouge Parish 439,729 Parish in Louisiana, United States
Jefferson Parish 432,346 Parish in Louisiana, United States
Orleans Parish 389,476 New Orleans consolidated city-parish in Louisiana, United States
New Orleans 389,476 The most populous city in Louisiana and the center of the New Orleans metropolitan area.
Saint Tammany Parish 263,446 Parish in Louisiana, United States of America
Lafayette Parish 246,518 Parish in Louisiana, United States
Caddo Parish 237,479 Parish in Louisiana, United States
Baton Rouge 219,052 The capital of Louisiana.
Calcasieu Parish 203,310 Parish in Louisiana, United States
Shreveport 184,786 The second most populous city in Louisiana.
Ouachita Parish 152,439 Parish in Louisiana, United States
Livingston Parish 143,737 Parish in Louisiana, United States
Metairie Terrace 142,489 A census-designated place in Jefferson Parish, Louisiana.
Metairie 138,481 The most populous suburb of New Orleans, Louisiana.
Tangipahoa Parish 136,765 Parish in Louisiana, United States
Ascension Parish 128,665 Parish in Louisiana, United States