Flood history · North Sioux City, SD 57049
Flood insurance claims in North Sioux City, SD 57049
362 claims since 1995 and $5.9 million paid. Here's what the public record shows, and how to check a specific address.
Claims by year
Every NFIP flood insurance claim reported in ZIP 57049 since 1978.
What the record says
About 76% of claims here were on properties rated outside high-risk zones (zones X, B or C). A lower-risk zone on the map is not a guarantee.
One event dominates the record: Late spring storms accounts for 86% of all claims in this ZIP code.
15 claims were filed in the last 10 years.
The most commonly recorded cause is rivers, streams or lakes overflowing.
Biggest flood events
| Event | Year | Claims | Share |
|---|---|---|---|
| Late spring storms | 2011 | 311 | 86% |
| June Midwest Flooding | 2024 | 7 | 2% |
| Unnamed flooding | 1997 | 1 | 0% |
Flood zone at time of claim
NFIP communities
Federal disaster declarations in Union County
Flood, hurricane and storm declarations since 2000.
11 flood, storm or hurricane declarations for Union County since 2000.
Check a specific address in North Sioux City.
ZIP-level history is the backdrop. See the official FEMA flood zone, ground elevation and next steps for one property, free.
Sources: FEMA OpenFEMA NFIP Redacted Claims (v3) and Disaster Declarations Summaries, FEMA NFIP Community Status Book; place names from GeoNames (CC BY 4.0). Data as of 2026-10-09. Payments are net building + contents payments in dollars at the time paid, not adjusted for inflation. Claims are grouped by the ZIP code reported on the claim. This product uses the FEMA OpenFEMA API but is not endorsed by FEMA. Information only; not an official flood zone determination or insurance advice.
All South Dakota ZIP codes · All states · Flood zones explained