| Rank |
County |
Population (2012) |
| 1 |
East Baton Rouge Parish, Louisiana
|
444,526
|
| 2 |
Jefferson Parish, Louisiana
|
433,676
|
| 3 |
Orleans Parish, Louisiana
|
369,250
|
| 4 |
Caddo Parish, Louisiana
|
257,093
|
| 5 |
St Tammany Parish, Louisiana
|
239,453
|
| 6 |
Lafayette Parish, Louisiana
|
227,055
|
| 7 |
Calcasieu Parish, Louisiana
|
194,493
|
| 8 |
Ouachita Parish, Louisiana
|
155,363
|
| 9 |
Rapides Parish, Louisiana
|
132,373
|
| 10 |
Livingston Parish, Louisiana
|
131,942
|
| 11 |
Tangipahoa Parish, Louisiana
|
123,441
|
| 12 |
Bossier Parish, Louisiana
|
122,197
|
| 13 |
Ascension Parish, Louisiana
|
112,286
|
| 14 |
Terrebonne Parish, Louisiana
|
111,893
|
| 15 |
Lafourche Parish, Louisiana
|
97,029
|
| 16 |
St Landry Parish, Louisiana
|
83,662
|
| 17 |
Iberia Parish, Louisiana
|
73,999
|
| 18 |
Acadia Parish, Louisiana
|
61,912
|
| 19 |
Vermilion Parish, Louisiana
|
58,723
|
| 20 |
Vernon Parish, Louisiana
|
53,869
|
| 21 |
St Mary Parish, Louisiana
|
53,697
|
| 22 |
St Martin Parish, Louisiana
|
52,726
|
| 23 |
St Charles Parish, Louisiana
|
52,681
|
| 24 |
Lincoln Parish, Louisiana
|
46,953
|
| 25 |
Washington Parish, Louisiana
|
46,670
|
| 26 |
St John the Baptist Parish, Louisiana
|
44,758
|
| 27 |
St Bernard Parish, Louisiana
|
41,635
|
| 28 |
Avoyelles Parish, Louisiana
|
41,632
|
| 29 |
Webster Parish, Louisiana
|
40,940
|
| 30 |
Natchitoches Parish, Louisiana
|
39,436
|
| 31 |
Beauregard Parish, Louisiana
|
36,281
|
| 32 |
Evangeline Parish, Louisiana
|
33,710
|
| 33 |
Iberville Parish, Louisiana
|
33,228
|
| 34 |
Jefferson Davis Parish, Louisiana
|
31,432
|
| 35 |
Morehouse Parish, Louisiana
|
27,559
|
| 36 |
De Soto Parish, Louisiana
|
26,963
|
| 37 |
Allen Parish, Louisiana
|
25,539
|
| 38 |
Sabine Parish, Louisiana
|
24,325
|
| 39 |
West Baton Rouge Parish, Louisiana
|
24,106
|
| 40 |
Plaquemines Parish, Louisiana
|
23,921
|
| 41 |
Assumption Parish, Louisiana
|
23,026
|
| 42 |
Pointe Coupee Parish, Louisiana
|
22,726
|
| 43 |
Union Parish, Louisiana
|
22,419
|
| 44 |
Grant Parish, Louisiana
|
22,068
|
| 45 |
St James Parish, Louisiana
|
21,722
|
| 46 |
Richland Parish, Louisiana
|
20,921
|
| 47 |
Franklin Parish, Louisiana
|
20,561
|
| 48 |
Concordia Parish, Louisiana
|
20,365
|
| 49 |
East Feliciana Parish, Louisiana
|
20,008
|
| 50 |
Claiborne Parish, Louisiana
|
16,828
|
| 51 |
Jackson Parish, Louisiana
|
16,216
|
| 52 |
West Feliciana Parish, Louisiana
|
15,405
|
| 53 |
Winn Parish, Louisiana
|
15,000
|
| 54 |
La Salle Parish, Louisiana
|
14,927
|
| 55 |
Bienville Parish, Louisiana
|
14,076
|
| 56 |
Madison Parish, Louisiana
|
12,154
|
| 57 |
West Carroll Parish, Louisiana
|
11,512
|
| 58 |
St Helena Parish, Louisiana
|
11,071
|
| 59 |
Catahoula Parish, Louisiana
|
10,292
|
| 60 |
Caldwell Parish, Louisiana
|
10,004
|
| 61 |
Red River Parish, Louisiana
|
8,983
|
| 62 |
East Carroll Parish, Louisiana
|
7,526
|
| 63 |
Cameron Parish, Louisiana
|
6,702
|
| 64 |
Tensas Parish, Louisiana
|
4,954
|