Mason, IL
Mason County in Illinois has 7 FEMA disaster declarations on record covering 1973–2013, most recently Severe Storms, Straight-Line Winds, and Flooding on May 10, 2013 (DR-4116). Its flood risk grade is A (Low risk), ranking #1659 of 3,277 U.S. counties, with 6 NFIP flood insurance claims totaling $81,832 in payouts. Flood risk is relatively low compared to the national average.
FEMA Disaster Declarations in Mason County
The 7 most recent federally declared disasters affecting Mason County, IL (1973–2013). Total declarations on record: 7.
| Declared | Incident Type | Title | FEMA Disaster # |
|---|---|---|---|
| May 10, 2013 | Flood | Severe Storms, Straight-Line Winds, and Flooding | DR-4116 |
| Sep 7, 2005 | Hurricane | Hurricane Katrina Evacuation | DR-3230 |
| Jul 9, 1993 | Flood | Severe Storms & Flooding | DR-997 |
| Mar 29, 1985 | Flood | Severe Storms & Flooding | DR-735 |
| Apr 30, 1979 | Flood | Severe Storms & Flooding | DR-583 |
| Jun 10, 1974 | Flood | Severe Storms & Flooding | DR-438 |
| Apr 26, 1973 | Flood | Severe Storms & Flooding | DR-373 |
Score Breakdown
The composite score of 11 is calculated from four weighted factors. See our methodology for details.
Other Counties in Illinois
| County | Grade | Score | Claims | Disasters |
|---|---|---|---|---|
| Alexander | A | 11 | 7 | 7 |
| Bureau | A | 11 | 0 | 7 |
| Greene | A | 11 | 1 | 7 |
| Henry | A | 11 | 0 | 7 |
| Jackson | A | 11 | 1 | 6 |
| Morgan | A | 11 | 3 | 7 |
More Counties in Illinois
Frequently Asked Questions
How many FEMA disaster declarations does Mason County, IL have?
Mason County, IL has 7 federal disaster declarations on FEMA record (1973–2013). The 5 most recent are: Severe Storms, Straight-Line Winds, and Flooding (declared May 10, 2013, DR-4116); Hurricane Katrina Evacuation (declared Sep 7, 2005, DR-3230); Severe Storms & Flooding (declared Jul 9, 1993, DR-997); Severe Storms & Flooding (declared Mar 29, 1985, DR-735); Severe Storms & Flooding (declared Apr 30, 1979, DR-583). Counts include flood, severe storm, hurricane, and coastal storm declarations from the OpenFEMA DisasterDeclarationsSummaries dataset.
What is the flood risk grade for Mason County, IL?
Mason County is graded A (composite score 11/100, low risk). It ranks #1659 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?
6 NFIP flood insurance claims have been filed in Mason County, IL, totaling $81,832 in payouts. The average claim is $13,639. Source: FEMA FimaNfipClaims v2 dataset.
Has Mason County, IL had any recent flood disasters?
Yes. The most recent FEMA declaration affecting Mason County was Severe Storms, Straight-Line Winds, and Flooding on May 10, 2013 (DR-4116). The county has 7 declared disasters in the OpenFEMA record covering 1973–2013.
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.