Fastest Growing Counties in Louisiana (2025)

County
Rank
Change (2020)
2025 Pop.
2020 Pop.
Livingston Parish18.04%154,323142,834
St. Tammany Parish25.76%280,275265,000
Ascension Parish35.47%133,926126,978
West Baton Rouge Parish45.38%28,73027,262
Tangipahoa Parish55.19%140,594133,654
Lafayette Parish64.82%253,822242,145
De Soto Parish72.92%27,63026,845
Bossier Parish81.83%131,079128,721
Beauregard Parish91.72%37,23336,605
St. Bernard Parish101.58%44,55143,856
West Feliciana Parish110.41%15,32115,259
Vermilion Parish120.2%57,07056,956
LaSalle Parish13-0.44%14,75814,823
Lincoln Parish14-0.79%47,92648,309
East Feliciana Parish15-0.95%19,27119,456
St. Helena Parish16-1.41%10,74410,898
Iberville Parish17-1.46%29,62530,064
Sabine Parish18-1.49%21,77022,099
St. Landry Parish19-1.56%81,03482,314
Washington Parish20-1.64%44,61345,357
Ouachita Parish21-1.76%157,296160,111
St. Martin Parish22-1.86%50,67351,634
Grant Parish23-2.24%21,65322,149
Richland Parish24-2.29%19,56820,026
East Baton Rouge Parish25-2.34%445,219455,899
Acadia Parish26-2.54%56,01757,478
Jackson Parish27-2.61%14,60614,998
Union Parish28-2.84%20,49221,092
Franklin Parish29-2.91%19,13919,713
Evangeline Parish30-3.41%31,19632,297
Rapides Parish31-3.8%124,724129,651
Lafourche Parish32-3.89%93,66697,454
Allen Parish33-4.08%21,76222,687
Winn Parish34-4.18%13,14613,720
Jefferson Davis Parish35-4.37%30,80132,210
Caldwell Parish36-4.51%9,1819,615
Calcasieu Parish37-4.51%206,707216,481
Avoyelles Parish38-4.67%37,79439,646
Natchitoches Parish39-4.84%35,57737,387
St. Charles Parish40-5.27%49,74452,513
Pointe Coupee Parish41-5.31%19,57620,673
Iberia Parish42-5.31%66,33770,055
Claiborne Parish43-5.61%13,31214,103
Red River Parish44-5.86%7,1387,582
Jefferson Parish45-6.02%413,271439,725
Webster Parish46-6.03%34,66036,883
Plaquemines Parish47-6.56%21,92223,460
St. James Parish48-6.58%18,79720,120
Caddo Parish49-6.61%221,290236,945
Assumption Parish50-6.72%19,55420,963
West Carroll Parish51-7.11%9,0079,696
Terrebonne Parish52-7.15%101,584109,405
St. Mary Parish53-7.36%45,52749,142
Vernon Parish54-7.43%45,01048,622
Orleans Parish55-8%352,574383,241
Bienville Parish56-8.05%11,87412,913
St. John the Baptist Parish57-8.26%38,86642,366
Concordia Parish58-8.38%17,01218,569
Catahoula Parish59-9.16%8,0348,844
Morehouse Parish60-9.53%23,03725,465
East Carroll Parish61-10.65%6,6097,397
Tensas Parish62-10.79%3,6644,107
Madison Parish63-11.57%8,7789,927
Cameron Parish64-19.76%4,5125,623

Louisiana County Growth Overview

Louisiana's counties show varied growth patterns from 2020 to 2025. Livingston Parish leads with 8.04% annualized growth, followed by St. Tammany Parish (5.76%) and Ascension Parish (5.47%). The largest counties are East Baton Rouge Parish (445,219), Jefferson Parish (413,271), and Orleans Parish (352,574). Of the 64 counties in Louisiana, 12 are growing while 52 have experienced population decline. Overall, counties averaged -3.58% annualized growth, with total population growing by -2.3% annually.