Population of Counties in Louisiana (2021)

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 2021 Population Growth Since 2010 Density (mi²)
East Baton Rouge Parish436,061-1.10%376.78
Jefferson Parish429,711-0.67%371.29
Orleans Parish388,42411.69%335.62
St. Tammany Parish265,18713.06%229.13
Lafayette Parish246,94411.08%213.37
Caddo Parish234,946-8.08%203.00
Calcasieu Parish203,9545.66%176.23
Ouachita Parish150,695-2.13%130.21
Livingston Parish143,57911.88%124.06
Tangipahoa Parish136,60012.44%118.03
Ascension Parish130,09620.58%112.41
Rapides Parish128,292-2.63%110.85
Bossier Parish127,0737.99%109.80
Terrebonne Parish109,057-2.20%94.23
Lafourche Parish96,8800.14%83.71
St. Landry Parish80,808-3.22%69.82
Iberia Parish67,680-7.43%58.48
Acadia Parish61,707-0.27%53.32
Vermilion Parish58,7611.16%50.77
St. Charles Parish53,7501.76%46.44
St. Martin Parish53,1691.81%45.94
St. Mary Parish48,362-11.34%41.79
St. Bernard Parish48,17230.82%41.62
Vernon Parish46,085-12.62%39.82
Lincoln Parish46,002-1.81%39.75
Washington Parish45,406-3.57%39.23
St. John the Baptist Parish42,273-7.28%36.53
Avoyelles Parish39,628-5.89%34.24
Beauregard Parish37,7535.36%32.62
Webster Parish37,436-9.13%32.35
Natchitoches Parish37,242-5.78%32.18
Evangeline Parish33,193-2.25%28.68
Iberville Parish32,147-3.72%27.78
Jefferson Davis Parish31,030-1.90%26.81
De Soto Parish27,5373.25%23.79
West Baton Rouge Parish26,59511.04%22.98
Allen Parish25,7470.18%22.25
Morehouse Parish23,974-13.99%20.71
Sabine Parish23,850-1.55%20.61
Plaquemines Parish22,821-1.28%19.72
Grant Parish22,295-0.18%19.26
Union Parish21,838-4.36%18.87
Pointe Coupee Parish21,432-6.09%18.52
Assumption Parish21,115-9.51%18.24
St. James Parish20,986-4.82%18.13
Richland Parish19,920-4.03%17.21
Franklin Parish19,717-5.25%17.04
East Feliciana Parish18,833-6.57%16.27
Concordia Parish18,605-10.72%16.08
West Feliciana Parish15,7200.51%13.58
Jackson Parish15,408-5.51%13.31
Claiborne Parish15,220-11.38%13.15
LaSalle Parish14,874-0.23%12.85
Winn Parish13,436-12.20%11.61
Bienville Parish13,037-8.87%11.26
West Carroll Parish10,536-8.98%9.10
Madison Parish10,461-13.59%9.04
St. Helena Parish10,022-10.49%8.66
Caldwell Parish9,826-3.17%8.49
Catahoula Parish9,270-10.67%8.01
Red River Parish8,274-9.07%7.15
Cameron Parish6,893-0.35%5.96
East Carroll Parish6,595-14.76%5.70
Tensas Parish4,062-22.32%3.51