Most Flood-Prone Counties in Louisiana

Based on NOAA Storm Events Database records from 1996 to 2025, these are the Louisiana counties with the most recorded flood events. Caddo Parish tops the list with 269 events. The data includes river floods, flash floods, coastal flooding, and hurricane-related flooding.

Rank	County	Total Events	River Floods	Flash Floods
1	Caddo Parish	269	23	246
2	Orleans Parish	209	13	194
3	St. Tammany Parish	146	23	123
4	Bossier Parish	137	12	125
5	Calcasieu Parish	126	19	107
6	Ouachita Parish	118	12	106
7	Jefferson Parish	103	12	88
8	East Baton Rouge Parish	98	6	92
9	Natchitoches Parish	93	6	87
10	Webster Parish	62	4	58
11	De Soto Parish	60	5	55
12	St. Charles Parish	60	3	56
13	Lafayette Parish	58	8	50
14	Sabine Parish	56	1	55
15	Morehouse Parish	50	4	46
16	Rapides Parish	49	6	43
17	Grant Parish	48	4	44
18	Richland Parish	47	3	44
19	Union Parish	45	3	42
20	St. Landry Parish	44	8	36
21	Franklin Parish	43	1	42
22	Iberia Parish	42	6	36
23	Winn Parish	41	4	37
24	Beauregard Parish	40	6	34
25	St. Martin Parish	36	5	31
26	West Carroll Parish	35	2	33
27	Red River Parish	35	6	29
28	Jefferson Davis Parish	34	5	29
29	Acadia Parish	34	5	29
30	LaSalle Parish	34	1	33
31	Tangipahoa Parish	33	7	26
32	Concordia Parish	32	3	29
33	Bienville Parish	32	4	28
34	Lincoln Parish	32	1	31
35	Vernon Parish	32	5	27
36	East Carroll Parish	31	4	27
37	Vermilion Parish	31	5	26
38	Ascension Parish	30	3	27
39	Catahoula Parish	29	2	27
40	St. Mary Parish	28	6	22
41	Lafourche Parish	28	4	21
42	Terrebonne Parish	28	2	25
43	Tensas Parish	27	2	25
44	Avoyelles Parish	27	5	22
45	Evangeline Parish	26	2	24
46	St. Bernard Parish	26	3	20
47	Claiborne Parish	25	1	24
48	Caldwell Parish	24	4	20
49	Livingston Parish	24	1	22
50	Madison Parish	24	3	21
51	Washington Parish	23	4	19
52	Allen Parish	22	3	19
53	Jackson Parish	20	0	20
54	East Feliciana Parish	19	0	19
55	St. James Parish	18	5	12
56	Pointe Coupee Parish	17	1	16
57	Cameron Parish	15	4	8
58	St. John the Baptist Parish	14	2	11
59	Iberville Parish	13	3	10
60	Assumption Parish	10	1	8
61	Plaquemines Parish	10	1	7
62	West Baton Rouge Parish	10	0	10
63	West Feliciana Parish	9	1	8
64	St. Helena Parish	5	1	4

Source: NOAA Storm Events Database (1996–2025).

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Most Flood-Prone Counties in Louisiana

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