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. Westchester County tops the list with 270 events. The data includes river floods, flash floods, coastal flooding, and hurricane-related flooding.

Rank	County	Total Events	River Floods	Flash Floods
1	Westchester County	270	49	221
2	Suffolk County	253	17	234
3	Herkimer County	222	80	142
4	Broome County	200	44	156
5	Nassau County	192	21	169
6	Albany County	189	71	118
7	Steuben County	175	3	172
8	Queens County	174	18	155
9	Ulster County	166	95	71
10	Erie County	151	57	94
11	Orange County	147	26	121
12	Oneida County	129	29	100
13	Washington County	125	63	62
14	Montgomery County	115	56	59
15	Rockland County	114	33	81
16	Chenango County	109	27	82
17	Saratoga County	109	44	65
18	Greene County	108	46	62
19	Delaware County	106	22	84
20	Chautauqua County	105	11	94
21	Cattaraugus County	98	16	82
22	Allegany County	96	10	86
23	Rensselaer County	95	35	60
24	Columbia County	93	29	64
25	Warren County	92	58	34
26	Monroe County	89	33	56
27	Dutchess County	84	21	63
28	Kings County	83	12	71
29	Essex County	82	23	59
30	Ontario County	80	15	65
31	Sullivan County	78	11	67
32	Bronx County	75	15	60
33	Schenectady County	72	31	41
34	New York County	71	14	57
35	Tioga County	71	11	60
36	Schoharie County	70	31	39
37	Onondaga County	68	7	61
38	Otsego County	68	1	67
39	Cortland County	67	10	57
40	Richmond County	66	13	53
41	Lewis County	58	19	39
42	Cayuga County	55	10	45
43	Livingston County	53	11	42
44	Madison County	53	4	49
45	Clinton County	50	13	37
46	Oswego County	49	23	26
47	Chemung County	47	5	42
48	Niagara County	45	13	32
49	Yates County	45	2	43
50	Franklin County	41	15	26
51	Tompkins County	36	6	30
52	Wayne County	36	8	28
53	Fulton County	34	14	20
54	Wyoming County	34	6	28
55	Hamilton County	33	23	10
56	Genesee County	28	9	19
57	Putnam County	28	4	24
58	Seneca County	26	4	22
59	St. Lawrence County	25	8	17
60	Jefferson County	23	13	10
61	Schuyler County	21	0	21
62	Orleans County	18	4	14

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

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Most Flood-Prone Counties in New York

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