Population of Counties in Louisiana (2020)

The most populous county in the state of Louisiana, with a population of 440,956, is East Baton Rouge Parish. Since the last U.S. census was taken in 2010, East Baton Rouge Parish has seen a population growth of just 0.09%. Other major counties in Louisiana following East Baton Rouge Parish are Jefferson Parish (434,051), Orleans Parish (391,006) with the city of New Orleans, St. Tammany Parish (258,111), Caddo Parish (242,922) with the city of Shreveport, and Lafayette Parish (242,782) with the city of Lafayette. Of these counties, only Caddo Parish reported a declining population with a growth rate of -4.96%. Orleans Parish experienced the most rapid growth at 12.43%.

Louisiana Counties with the Fewest Residents

The least populous county in the state of Louisiana, with a population of 4,462, is Tensas Parish. Tensas Parish has seen a decrease in its population since the census with a growth rate of -14.7% since the 2010 census. Louisiana has many other parishes with populations below 10,000 including Cameron Parish (6,968), East Carroll Parish (7,037), Red River Parish (8,477), Catahoula Parish (9,608), and Caldwell Parish (9,960). All of these parishes have experienced a decline in population except Cameron Parish which has grown 0.75%. Tensas Parish had the most significant population decline.

Louisiana Counties with Rapid Growth

The parish with the most rapid rate of growth in Louisiana is St. Bernard Parish. Since 2010, St. Bernard Parish has seen an impressive growth rate of 26.88%, bringing the population in 2019 up to 46,721. Behind St. Bernard Parish is Ascension Parish (15.56%), Orleans Parish (12.43%), and West Baton Rouge Parish (10.32%). Tensas Parish has seen the most rapid decrease in population with a growth rate of -14.7% since 2010.

Name 2020 Population Growth Since 2010
East Baton Rouge Parish440,9560.09%
Jefferson Parish434,0510.33%
Orleans Parish391,00612.43%
St. Tammany Parish258,11110.05%
Caddo Parish242,922-4.96%
Lafayette Parish242,7829.23%
Calcasieu Parish203,1125.22%
Ouachita Parish154,4750.33%
Livingston Parish139,5678.46%
Tangipahoa Parish133,77710.12%
Rapides Parish130,562-0.91%
Bossier Parish127,1858.09%
Ascension Parish124,67215.56%
Terrebonne Parish111,021-0.41%
Lafourche Parish98,1151.40%
St. Landry Parish82,764-0.87%
Iberia Parish70,941-2.98%
Acadia Parish62,1900.51%
Vermilion Parish59,8302.98%
St. Martin Parish53,6212.60%
St. Charles Parish52,8790.12%
St. Mary Parish49,774-8.77%
Vernon Parish48,860-7.31%
Lincoln Parish47,1960.74%
St. Bernard Parish46,72126.88%
Washington Parish46,582-1.07%
St. John the Baptist Parish43,184-5.29%
Avoyelles Parish40,462-3.90%
Webster Parish38,798-5.82%
Natchitoches Parish38,659-2.20%
Beauregard Parish37,2533.96%
Evangeline Parish33,443-1.52%
Iberville Parish32,721-2.00%
Jefferson Davis Parish31,582-0.16%
De Soto Parish27,4362.88%
West Baton Rouge Parish26,42710.32%
Allen Parish25,605-0.44%
Morehouse Parish25,398-8.88%
Sabine Parish24,032-0.83%
Plaquemines Parish23,4101.25%
Grant Parish22,4820.66%
Union Parish22,330-2.20%
Assumption Parish22,300-4.43%
Pointe Coupee Parish21,940-3.85%
St. James Parish21,037-4.59%
Richland Parish20,192-2.73%
Franklin Parish20,156-3.14%
Concordia Parish19,572-6.08%
East Feliciana Parish19,305-4.30%
Claiborne Parish15,944-7.17%
Jackson Parish15,902-2.48%
West Feliciana Parish15,460-1.16%
LaSalle Parish14,9170.06%
Winn Parish14,134-7.63%
Bienville Parish13,308-6.99%
Madison Parish11,161-7.80%
West Carroll Parish10,982-5.13%
St. Helena Parish10,262-8.37%
Caldwell Parish9,960-1.90%
Catahoula Parish9,608-7.42%
Red River Parish8,477-6.84%
East Carroll Parish7,037-9.05%
Cameron Parish6,9680.75%
Tensas Parish4,462-14.70%