Ontario, NY
Ontario County in New York has 5 FEMA disaster declarations on record covering 1972–2012, most recently Hurricane Sandy on Oct 28, 2012 (DR-3351). Its flood risk grade is A (Low risk), ranking #2564 of 3,277 U.S. counties, with 15 NFIP flood insurance claims totaling $293,330 in payouts. Flood risk is relatively low compared to the national average.
FEMA Disaster Declarations in Ontario County
The 5 most recent federally declared disasters affecting Ontario County, NY (1972–2012). Total declarations on record: 5.
| Declared | Incident Type | Title | FEMA Disaster # |
|---|---|---|---|
| Oct 28, 2012 | Hurricane | Hurricane Sandy | DR-3351 |
| Jun 10, 2011 | Flood | Severe Storms, Flooding, Tornadoes, and Straight-Line Winds | DR-1993 |
| Sep 30, 2005 | Hurricane | Hurricane Katrina Evacuation | DR-3262 |
| Jan 24, 1996 | Flood | Severe Storms and Flooding | DR-1095 |
| Jun 23, 1972 | Flood | Tropical Storm Agnes | DR-338 |
Score Breakdown
The composite score of 9 is calculated from four weighted factors. See our methodology for details.
Other Counties in New York
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Frequently Asked Questions
How many FEMA disaster declarations does Ontario County, NY have?
Ontario County, NY has 5 federal disaster declarations on FEMA record (1972–2012). The 5 most recent are: Hurricane Sandy (declared Oct 28, 2012, DR-3351); Severe Storms, Flooding, Tornadoes, and Straight-Line Winds (declared Jun 10, 2011, DR-1993); Hurricane Katrina Evacuation (declared Sep 30, 2005, DR-3262); Severe Storms and Flooding (declared Jan 24, 1996, DR-1095); Tropical Storm Agnes (declared Jun 23, 1972, DR-338). Counts include flood, severe storm, hurricane, and coastal storm declarations from the OpenFEMA DisasterDeclarationsSummaries dataset.
What is the flood risk grade for Ontario County, NY?
Ontario County is graded A (composite score 9/100, low risk). It ranks #2564 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 Ontario County?
15 NFIP flood insurance claims have been filed in Ontario County, NY, totaling $293,330 in payouts. The average claim is $19,555. Source: FEMA FimaNfipClaims v2 dataset.
Has Ontario County, NY had any recent flood disasters?
Yes. The most recent FEMA declaration affecting Ontario County was Hurricane Sandy on Oct 28, 2012 (DR-3351). The county has 5 declared disasters in the OpenFEMA record covering 1972–2012.
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.
The methodology behind every numeric value on this page is publicly documented on the FEMA OpenFEMA datasets including the National Flood Hazard Layer and NFIP claims portal and described in detail on this site’s methodology page. Refresh cadence varies by underlying series; the page surfaces the as-of date for each number so readers can trace any figure back to the source release.
Practical use of this page is in combination with the comparison and ranking pages elsewhere on the site, which surface the same data for this entity’s peers within U.S. ZIPs, counties, and states. A single-entity reading without peer context can be misleading when an entity is an outlier on one axis but typical on another.
Source: FEMA OpenFEMA datasets, 2026.