Largest County in Louisiana, USA

Wondering about the largest or smallest county in Louisiana, USA in terms of total land area and population? Check out this resource to discover all the details regarding Louisiana counties ranking by population and land area.

What is the largest county in Louisiana by land area?
Vernon Parish County is the largest county in Louisiana spanning 1326.73 square miles, with an additional 13.56 square miles of water area. Following Vernon Parish County, Rapides Parish County ranks as the second largest in terms of land area, covering 1324.11 square miles, while Cameron Parish County secures the position as the third largest county in Louisiana.

What is the smallest county by land area in Louisiana?
Orleans Parish is the smallest in Louisiana by total land area, covers about 169.5 square miles.

What is the largest county by population in Louisiana?
East Baton Rouge Parish in Louisiana, USA, stands as the most populous county having 456,781 residents as per the 2022 census data.

What is the smallest county by population in Louisiana?
Tensas Parish is the smallest in Louisiana by total population, having 4,147 residents as per the 2022 census data.

Louisiana Counties by Size

Rank	County in Louisiana	Land Area square miles
1	Vernon Parish County	1326.73
2	Rapides Parish County	1324.11
3	Cameron Parish County	1284.64
4	Natchitoches Parish County	1253.01
5	Terrebonne Parish County	1229.89
6	Vermilion Parish County	1172.05
7	Beauregard Parish County	1157.48
8	Lafourche Parish County	1067.79
9	Calcasieu Parish County	1064.08
10	Winn Parish County	950
11	St. Landry Parish County	924.03
12	Caddo Parish County	879.47
13	Union Parish	876.91
14	De Soto Parish	876.45
15	Sabine Parish	866.62
16	St. Tammany Parish	845.28
17	Bossier Parish	839.58
18	Avoyelles Parish	831.68
19	Bienville Parish	811.34
20	Morehouse Parish	794.95
21	Tangipahoa Parish	791.17
22	Plaquemines Parish	780.59
23	Allen Parish	762.08
24	Claiborne Parish	754.79
25	St. Martin Parish	737.47
26	Catahoula Parish	707.95
27	Concordia Parish	697.14
28	Washington Parish	669.64
29	Evangeline Parish	662.43
30	Acadia Parish	655.24
31	Jefferson Davis Parish	651.52
32	Livingston Parish	648.13
33	Grant Parish	643.75
34	La Salle Parish	624.85
35	Franklin Parish	624.3
36	Madison Parish	623.89
37	Iberville Parish	618.72
38	Ouachita Parish	610.35
39	Tensas Parish	603.3
40	Webster Parish	593.32
41	Iberia Parish	574.74
42	Jackson Parish	569.38
43	St. Mary Parish	558.53
44	Pointe Coupee Parish	556.88
45	Richland Parish	555.61
46	Caldwell Parish	529.77
47	Lincoln Parish	471.64
48	East Baton Rouge Parish	455.5
49	East Feliciana Parish	453.29
50	East Carroll Parish	420.89
51	St. Helena Parish	408.53
52	West Feliciana Parish	403.32
53	Red River Parish	388.98
54	West Carroll Parish	359.69
55	Assumption Parish	344.02
56	Jefferson Parish	300.86
57	Ascension Parish	289.97
58	St. Charles Parish	277.74
59	Lafayette Parish	268.83
60	St. James Parish	237.86
61	St. John the Baptist Parish	214.47
62	West Baton Rouge Parish	192.35
63	Orleans Parish	169.5