St. Mary's, MD
St. Mary's County in Maryland has 8 FEMA disaster declarations on record covering 1999–2021, most recently Tropical Storm Isaias on Feb 4, 2021 (DR-4583). Its flood risk grade is A (Low risk), ranking #332 of 3,277 U.S. counties, with 17 NFIP flood insurance claims totaling $54,848 in payouts. Flood risk is relatively low compared to the national average.
FEMA Disaster Declarations in St. Mary's County
The 8 most recent federally declared disasters affecting St. Mary's County, MD (1999–2021). Total declarations on record: 8.
| Declared | Incident Type | Title | FEMA Disaster # |
|---|---|---|---|
| Feb 4, 2021 | Hurricane | Tropical Storm Isaias | DR-4583 |
| Nov 20, 2012 | Hurricane | Hurricane Sandy | DR-4091 |
| Oct 28, 2012 | Hurricane | Hurricane Sandy | DR-3349 |
| Sep 16, 2011 | Hurricane | Hurricane Irene | DR-4034 |
| Aug 27, 2011 | Hurricane | Hurricane Irene | DR-3335 |
| Sep 13, 2005 | Hurricane | Hurricane Katrina Evacuation | DR-3251 |
| Sep 19, 2003 | Hurricane | Hurricane Isabel | DR-1492 |
| Sep 24, 1999 | Hurricane | Hurricane Floyd Major Disaster Declarations | DR-1303 |
Score Breakdown
The composite score of 18 is calculated from four weighted factors. See our methodology for details.
Other Counties in Maryland
| County | Grade | Score | Claims | Disasters |
|---|---|---|---|---|
| Dorchester | A | 19 | 26 | 8 |
| Baltimore | A | 19 | 59 | 11 |
| Anne Arundel | A | 19 | 64 | 10 |
| Queen Anne's | A | 19 | 17 | 7 |
| Somerset | A | 19 | 19 | 8 |
| Harford | A | 17 | 10 | 10 |
More Counties in Maryland
Frequently Asked Questions
How many FEMA disaster declarations does St. Mary's County, MD have?
St. Mary's County, MD has 8 federal disaster declarations on FEMA record (1999–2021). The 5 most recent are: Tropical Storm Isaias (declared Feb 4, 2021, DR-4583); Hurricane Sandy (declared Nov 20, 2012, DR-4091); Hurricane Sandy (declared Oct 28, 2012, DR-3349); Hurricane Irene (declared Sep 16, 2011, DR-4034); Hurricane Irene (declared Aug 27, 2011, DR-3335). Counts include flood, severe storm, hurricane, and coastal storm declarations from the OpenFEMA DisasterDeclarationsSummaries dataset.
What is the flood risk grade for St. Mary's County, MD?
St. Mary's County is graded A (composite score 18/100, low risk). It ranks #332 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 St. Mary's County?
17 NFIP flood insurance claims have been filed in St. Mary's County, MD, totaling $54,848 in payouts. The average claim is $3,226. Source: FEMA FimaNfipClaims v2 dataset.
Has St. Mary's County, MD had any recent flood disasters?
Yes. The most recent FEMA declaration affecting St. Mary's County was Tropical Storm Isaias on Feb 4, 2021 (DR-4583). The county has 8 declared disasters in the OpenFEMA record covering 1999–2021.
The this entity record above pulls directly from FEMA OpenFEMA datasets including the National Flood Hazard Layer and NFIP claims. What follows is the per-entity context — how this entity sits in the broader U.S. flood risk, NFIP claims, and disaster declarations distribution and which underlying factors drive the headline numbers.
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.
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.