Custer, MT
Custer County in Montana has 3 FEMA disaster declarations on record covering 2005–2018, most recently Flooding on Oct 31, 2018 (DR-4405). Its flood risk grade is A (Low risk), ranking #2533 of 3,277 U.S. counties, with 0 NFIP flood insurance claims totaling $0 in payouts. Flood risk is relatively low compared to the national average.
FEMA Disaster Declarations in Custer County
The 3 most recent federally declared disasters affecting Custer County, MT (2005–2018). Total declarations on record: 3.
| Declared | Incident Type | Title | FEMA Disaster # |
|---|---|---|---|
| Oct 31, 2018 | Flood | Flooding | DR-4405 |
| Jul 10, 2013 | Flood | Flooding | DR-4127 |
| Sep 13, 2005 | Hurricane | Hurricane Katrina Evacuation | DR-3253 |
Score Breakdown
The composite score of 9 is calculated from four weighted factors. See our methodology for details.
Other Counties in Montana
| County | Grade | Score | Claims | Disasters |
|---|---|---|---|---|
| Roosevelt | A | 9 | 0 | 2 |
| Sheridan | A | 9 | 0 | 2 |
| Sweet Grass | A | 9 | 0 | 2 |
| Yellowstone | A | 9 | 2 | 3 |
| Lake | A | 9 | 0 | 3 |
| Prairie | A | 9 | 0 | 2 |
More Counties in Montana
Frequently Asked Questions
How many FEMA disaster declarations does Custer County, MT have?
Custer County, MT has 3 federal disaster declarations on FEMA record (2005–2018). The 3 most recent are: Flooding (declared Oct 31, 2018, DR-4405); Flooding (declared Jul 10, 2013, DR-4127); Hurricane Katrina Evacuation (declared Sep 13, 2005, DR-3253). Counts include flood, severe storm, hurricane, and coastal storm declarations from the OpenFEMA DisasterDeclarationsSummaries dataset.
What is the flood risk grade for Custer County, MT?
Custer County is graded A (composite score 9/100, low risk). It ranks #2533 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 Custer County?
0 NFIP flood insurance claims have been filed in Custer County, MT, totaling $0 in payouts. The average claim is $0. Source: FEMA FimaNfipClaims v2 dataset.
Has Custer County, MT had any recent flood disasters?
Yes. The most recent FEMA declaration affecting Custer County was Flooding on Oct 31, 2018 (DR-4405). The county has 3 declared disasters in the OpenFEMA record covering 2005–2018.
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.