Sioux, ND
Sioux County in North Dakota has 9 FEMA disaster declarations on record covering 1969–2011, most recently Flooding on May 10, 2011 (DR-1981). Its flood risk grade is A (Low risk), ranking #1284 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 Sioux County
The 9 most recent federally declared disasters affecting Sioux County, ND (1969–2011). Total declarations on record: 9.
| Declared | Incident Type | Title | FEMA Disaster # |
|---|---|---|---|
| May 10, 2011 | Flood | Flooding | DR-1981 |
| Apr 7, 2011 | Flood | Flooding | DR-3318 |
| Sep 13, 2005 | Coastal Storm | Hurricane Katrina Evacuation | DR-3247 |
| Jun 8, 1999 | Flood | Severe Storms, Flooding, Snow, Ice, Ground Saturation, Lanslides, Mudslides, and Tor | DR-1279 |
| Apr 7, 1997 | Flood | Severe Flooding,severe Winter Storms, Snowmelt, Spring Rains | DR-1174 |
| Jul 26, 1993 | Flood | Severe Storms & Flooding | DR-1001 |
| Apr 17, 1978 | Flood | Storms, Ice Jams, Snowmelt & Flooding | DR-554 |
| May 24, 1975 | Flood | Flooding from Rains & Snowmelt | DR-469 |
| Apr 18, 1969 | Flood | Flooding | DR-256 |
Score Breakdown
The composite score of 12 is calculated from four weighted factors. See our methodology for details.
Other Counties in North Dakota
| County | Grade | Score | Claims | Disasters |
|---|---|---|---|---|
| McIntosh | A | 12 | 0 | 9 |
| Divide | A | 12 | 0 | 9 |
| Oliver | A | 12 | 0 | 9 |
| Stark | A | 12 | 0 | 8 |
| Williams | A | 12 | 0 | 8 |
| Burke | A | 13 | 0 | 10 |
More Counties in North Dakota
Frequently Asked Questions
How many FEMA disaster declarations does Sioux County, ND have?
Sioux County, ND has 9 federal disaster declarations on FEMA record (1969–2011). The 5 most recent are: Flooding (declared May 10, 2011, DR-1981); Flooding (declared Apr 7, 2011, DR-3318); Hurricane Katrina Evacuation (declared Sep 13, 2005, DR-3247); Severe Storms, Flooding, Snow, Ice, Ground Saturation, Lanslides, Mudslides, and Tor (declared Jun 8, 1999, DR-1279); Severe Flooding,severe Winter Storms, Snowmelt, Spring Rains (declared Apr 7, 1997, DR-1174). Counts include flood, severe storm, hurricane, and coastal storm declarations from the OpenFEMA DisasterDeclarationsSummaries dataset.
What is the flood risk grade for Sioux County, ND?
Sioux County is graded A (composite score 12/100, low risk). It ranks #1284 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 Sioux County?
0 NFIP flood insurance claims have been filed in Sioux County, ND, totaling $0 in payouts. The average claim is $0. Source: FEMA FimaNfipClaims v2 dataset.
Has Sioux County, ND had any recent flood disasters?
Yes. The most recent FEMA declaration affecting Sioux County was Flooding on May 10, 2011 (DR-1981). The county has 9 declared disasters in the OpenFEMA record covering 1969–2011.
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.