Sully, SD
Sully County in South Dakota has 7 FEMA disaster declarations on record covering 1986–2019, most recently Severe Winter Storm, Snowstorm, and Flooding on Jun 7, 2019 (DR-4440). Its flood risk grade is A (Low risk), ranking #1687 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 Sully County
The 7 most recent federally declared disasters affecting Sully County, SD (1986–2019). Total declarations on record: 7.
| Declared | Incident Type | Title | FEMA Disaster # |
|---|---|---|---|
| Jun 7, 2019 | Flood | Severe Winter Storm, Snowstorm, and Flooding | DR-4440 |
| May 13, 2011 | Flood | Flooding | DR-1984 |
| May 13, 2010 | Flood | Flooding | DR-1915 |
| Sep 10, 2005 | Coastal Storm | Hurricane Katrina Evacuation | DR-3234 |
| Apr 7, 1997 | Flood | Severe Flooding, Sever Winter Storms,heavy Rains High Winds | DR-1173 |
| May 26, 1995 | Flood | Flooding | DR-1052 |
| May 3, 1986 | Flood | Severe Storms & Flooding | DR-764 |
Score Breakdown
The composite score of 11 is calculated from four weighted factors. See our methodology for details.
Other Counties in South Dakota
| County | Grade | Score | Claims | Disasters |
|---|---|---|---|---|
| Potter | A | 11 | 0 | 7 |
| Jackson | A | 11 | 0 | 6 |
| Meade | A | 11 | 1 | 7 |
| Pennington | A | 11 | 9 | 7 |
| Walworth | A | 11 | 0 | 6 |
| Davison | A | 11 | 2 | 6 |
More Counties in South Dakota
Frequently Asked Questions
How many FEMA disaster declarations does Sully County, SD have?
Sully County, SD has 7 federal disaster declarations on FEMA record (1986–2019). The 5 most recent are: Severe Winter Storm, Snowstorm, and Flooding (declared Jun 7, 2019, DR-4440); Flooding (declared May 13, 2011, DR-1984); Flooding (declared May 13, 2010, DR-1915); Hurricane Katrina Evacuation (declared Sep 10, 2005, DR-3234); Severe Flooding, Sever Winter Storms,heavy Rains High Winds (declared Apr 7, 1997, DR-1173). Counts include flood, severe storm, hurricane, and coastal storm declarations from the OpenFEMA DisasterDeclarationsSummaries dataset.
What is the flood risk grade for Sully County, SD?
Sully County is graded A (composite score 11/100, low risk). It ranks #1687 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 Sully County?
0 NFIP flood insurance claims have been filed in Sully County, SD, totaling $0 in payouts. The average claim is $0. Source: FEMA FimaNfipClaims v2 dataset.
Has Sully County, SD had any recent flood disasters?
Yes. The most recent FEMA declaration affecting Sully County was Severe Winter Storm, Snowstorm, and Flooding on Jun 7, 2019 (DR-4440). The county has 7 declared disasters in the OpenFEMA record covering 1986–2019.
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.
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.