Nassau, NY
Nassau County in New York has 16 FEMA disaster declarations on record covering 1971–2024, most recently Severe Storm and Flooding on Jan 30, 2024 (DR-4755). Its flood risk grade is B (Moderate risk), ranking #54 of 3,277 U.S. counties, with 373 NFIP flood insurance claims totaling $7,338,653 in payouts. Flood risk is relatively low compared to the national average.
FEMA Disaster Declarations in Nassau County
The 16 most recent federally declared disasters affecting Nassau County, NY (1971–2024). Total declarations on record: 16.
| Declared | Incident Type | Title | FEMA Disaster # |
|---|---|---|---|
| Jan 30, 2024 | Flood | Severe Storm and Flooding | DR-4755 |
| Sep 5, 2021 | Hurricane | Remnants of Hurricane Ida | DR-4615 |
| Sep 2, 2021 | Hurricane | Remnants of Hurricane Ida | DR-3572 |
| Aug 22, 2021 | Hurricane | Hurricane Henri | DR-3565 |
| Oct 2, 2020 | Hurricane | Tropical Storm Isaias | DR-4567 |
| Oct 30, 2012 | Hurricane | Hurricane Sandy | DR-4085 |
| Oct 28, 2012 | Hurricane | Hurricane Sandy | DR-3351 |
| Aug 31, 2011 | Hurricane | Hurricane Irene | DR-4020 |
| Aug 26, 2011 | Hurricane | Hurricane Irene | DR-3328 |
| Sep 30, 2005 | Hurricane | Hurricane Katrina Evacuation | DR-3262 |
| Sep 19, 1999 | Hurricane | Hurricane Floyd Major Disaster Declarations | DR-1296 |
| Dec 21, 1992 | Flood | Coastal Storm, High Tides, Heavy Rain, & Flooding | DR-974 |
| Oct 18, 1985 | Hurricane | Hurricane Gloria | DR-750 |
| Apr 17, 1984 | Flood | Coastal Storms & Flooding | DR-702 |
| Sep 3, 1976 | Hurricane | Hurricane Belle | DR-520 |
| Sep 13, 1971 | Flood | Severe Storms & Flooding | DR-311 |
Score Breakdown
The composite score of 25 is calculated from four weighted factors. See our methodology for details.
Other Counties in New York
| County | Grade | Score | Claims | Disasters |
|---|---|---|---|---|
| Westchester | B | 26 | 438 | 17 |
| Rockland | B | 24 | 25 | 16 |
| Orange | B | 23 | 30 | 14 |
| Queens | B | 23 | 213 | 12 |
| New York | B | 21 | 34 | 11 |
| Kings | B | 21 | 106 | 11 |
More Counties in New York
Frequently Asked Questions
How many FEMA disaster declarations does Nassau County, NY have?
Nassau County, NY has 16 federal disaster declarations on FEMA record (1971–2024). The 5 most recent are: Severe Storm and Flooding (declared Jan 30, 2024, DR-4755); Remnants of Hurricane Ida (declared Sep 5, 2021, DR-4615); Remnants of Hurricane Ida (declared Sep 2, 2021, DR-3572); Hurricane Henri (declared Aug 22, 2021, DR-3565); Tropical Storm Isaias (declared Oct 2, 2020, DR-4567). Counts include flood, severe storm, hurricane, and coastal storm declarations from the OpenFEMA DisasterDeclarationsSummaries dataset.
What is the flood risk grade for Nassau County, NY?
Nassau County is graded B (composite score 25/100, moderate risk). It ranks #54 of 3,277 U.S. counties for flood risk in our scoring model. The grade combines NFIP claims density (40%), disaster frequency (25%), claim severity (20%), and year-over-year trend (15%).
How many NFIP flood insurance claims have been filed in Nassau County?
373 NFIP flood insurance claims have been filed in Nassau County, NY, totaling $7,338,653 in payouts. The average claim is $19,675. Source: FEMA FimaNfipClaims v2 dataset.
Has Nassau County, NY had any recent flood disasters?
Yes. The most recent FEMA declaration affecting Nassau County was Severe Storm and Flooding on Jan 30, 2024 (DR-4755). The county has 16 declared disasters in the OpenFEMA record covering 1971–2024.
For this entity, the underlying data on this page comes from FEMA OpenFEMA datasets including the National Flood Hazard Layer and NFIP claims. The breakdown above is the federal record; the paragraphs below add the per-entity context that makes the headline numbers usable for a real decision rather than just a data lookup.
Every number on this page links back to FEMA OpenFEMA datasets including the National Flood Hazard Layer and NFIP claims; the methodology page describes the inputs, refresh cadence, and known limitations of the underlying data product.
For readers using this page as a decision input, the related-entity pages elsewhere on the site provide the comparison set. The most useful comparison for this entity is typically a peer within U.S. ZIPs, counties, and states with similar size, similar exposure, or similar geography — not the national-level summary alone.
Source: FEMA OpenFEMA datasets, 2026.