Mason, WA
Mason County in Washington has 13 FEMA disaster declarations on record covering 1964–2026, most recently Severe Storms, Straight-Line Winds, Flooding, Landslides, and Mudslides on Apr 7, 2026 (DR-4906). Its flood risk grade is A (Low risk), ranking #565 of 3,277 U.S. counties, with 9 NFIP flood insurance claims totaling $359,648 in payouts. Flood risk is relatively low compared to the national average.
FEMA Disaster Declarations in Mason County
The 13 most recent federally declared disasters affecting Mason County, WA (1964–2026). Total declarations on record: 13.
| Declared | Incident Type | Title | FEMA Disaster # |
|---|---|---|---|
| Apr 7, 2026 | Flood | Severe Storms, Straight-Line Winds, Flooding, Landslides, and Mudslides | DR-4906 |
| Dec 12, 2025 | Flood | Severe Storms, Straight-Line Winds, Flooding, Landslides, and Mudslides | DR-3629 |
| Mar 29, 2022 | Flood | Severe Winter Storms, Snowstorms, Straight-Line Winds, Floodin | DR-4650 |
| Apr 23, 2020 | Flood | Severe Storms, Flooding, Landslides, and Mudslides | DR-4539 |
| Feb 2, 2016 | Flood | Severe Winter Storm, Straight-Line Winds, Flooding, Landslides, Mudslides, and A T | DR-4253 |
| Jan 30, 2009 | Flood | Severe Winter Storm, Landslides, Mudslides, and Flooding | DR-1817 |
| Sep 7, 2005 | Coastal Storm | Hurricane Katrina Evacuation | DR-3227 |
| Apr 2, 1997 | Flood | Heavy Rains, Snow Melt, Flooding, Land & MUD Slides | DR-1172 |
| Nov 26, 1990 | Flood | Severe Storms & Flooding | DR-883 |
| Dec 31, 1979 | Flood | Storms, High Tides, Mudslides & Flooding | DR-612 |
| Dec 13, 1975 | Flood | Severe Storms & Flooding | DR-492 |
| Jan 25, 1974 | Flood | Severe Storms, Snowmelt & Flooding | DR-414 |
| Dec 29, 1964 | Flood | Heavy Rains & Flooding | DR-185 |
Score Breakdown
The composite score of 15 is calculated from four weighted factors. See our methodology for details.
Other Counties in Washington
| County | Grade | Score | Claims | Disasters |
|---|---|---|---|---|
| Lewis | A | 15 | 23 | 20 |
| Kittitas | A | 15 | 7 | 9 |
| Pierce | A | 15 | 38 | 12 |
| Wahkiakum | A | 16 | 2 | 15 |
| Jefferson | A | 14 | 4 | 12 |
| Pacific | A | 14 | 7 | 12 |
More Counties in Washington
Frequently Asked Questions
How many FEMA disaster declarations does Mason County, WA have?
Mason County, WA has 13 federal disaster declarations on FEMA record (1964–2026). The 5 most recent are: Severe Storms, Straight-Line Winds, Flooding, Landslides, and Mudslides (declared Apr 7, 2026, DR-4906); Severe Storms, Straight-Line Winds, Flooding, Landslides, and Mudslides (declared Dec 12, 2025, DR-3629); Severe Winter Storms, Snowstorms, Straight-Line Winds, Floodin (declared Mar 29, 2022, DR-4650); Severe Storms, Flooding, Landslides, and Mudslides (declared Apr 23, 2020, DR-4539); Severe Winter Storm, Straight-Line Winds, Flooding, Landslides, Mudslides, and A T (declared Feb 2, 2016, DR-4253). Counts include flood, severe storm, hurricane, and coastal storm declarations from the OpenFEMA DisasterDeclarationsSummaries dataset.
What is the flood risk grade for Mason County, WA?
Mason County is graded A (composite score 15/100, low risk). It ranks #565 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 Mason County?
9 NFIP flood insurance claims have been filed in Mason County, WA, totaling $359,648 in payouts. The average claim is $39,961. Source: FEMA FimaNfipClaims v2 dataset.
Has Mason County, WA had any recent flood disasters?
Yes. The most recent FEMA declaration affecting Mason County was Severe Storms, Straight-Line Winds, Flooding, Landslides, and Mudslides on Apr 7, 2026 (DR-4906). The county has 13 declared disasters in the OpenFEMA record covering 1964–2026.
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.
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.