Most Flood-Prone Counties in New York

Based on NOAA Storm Events Database records from 1996 to 2025, these are the New York counties with the most recorded flood events. Suffolk County tops the list with 399 events. The data includes river floods, flash floods, coastal flooding, and hurricane-related flooding.

Rank	County	Total Events	River Floods	Flash Floods
1	Suffolk County	399	27	234
2	Westchester County	303	55	221
3	Nassau County	263	21	169
4	Herkimer County	260	116	142
5	Ulster County	232	154	71
6	Broome County	229	73	156
7	Albany County	208	87	118
8	Erie County	206	81	94
9	Queens County	206	18	155
10	Steuben County	179	7	172
11	Orange County	155	31	121
12	Washington County	155	91	62
13	Montgomery County	149	89	59
14	Saratoga County	148	81	65
15	Delaware County	137	53	84
16	Chenango County	135	53	82
17	Greene County	133	67	62
18	Oneida County	131	31	100
19	Rockland County	131	42	81
20	Essex County	128	65	59
21	Chautauqua County	122	13	94
22	Rensselaer County	120	57	60
23	Columbia County	110	43	64
24	Dutchess County	107	40	64
25	Warren County	107	71	34
26	Monroe County	106	42	56
27	Kings County	105	15	71
28	Cattaraugus County	103	21	82
29	Schoharie County	103	63	39
30	Allegany County	101	15	86
31	Bronx County	94	18	60
32	Schenectady County	94	51	41
33	Tioga County	91	31	60
34	New York County	87	17	57
35	Richmond County	86	16	53
36	Sullivan County	86	19	67
37	Cortland County	84	27	57
38	Clinton County	83	42	37
39	Ontario County	82	17	65
40	Otsego County	78	11	67
41	Onondaga County	70	9	61
42	Cayuga County	67	12	45
43	Lewis County	66	27	39
44	Chemung County	61	19	42
45	Niagara County	61	16	32
46	Oswego County	61	23	26
47	Livingston County	57	15	42
48	Madison County	53	4	49
49	Franklin County	52	26	26
50	Hamilton County	49	38	10
51	Wayne County	48	10	28
52	Yates County	45	2	43
53	Fulton County	41	19	20
54	Jefferson County	41	19	10
55	Wyoming County	40	12	28
56	Genesee County	38	19	19
57	Tompkins County	37	7	30
58	Putnam County	35	8	24
59	St. Lawrence County	35	18	17
60	Orleans County	28	6	14
61	Seneca County	26	4	22
62	Schuyler County	22	1	21

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

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Most Flood-Prone Counties in New York

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