Flood history · Mason City, IA 50401
Flood insurance claims in Mason City, IA 50401
202 claims since 1978 and $3.0 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 50401 since 1978.
What the record says
76% of claims were on properties in high-risk zones and 24% outside them.
One event dominates the record: Storm accounts for 42% of all claims in this ZIP code.
10 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 |
|---|---|---|---|
| Storm | 2008 | 85 | 42% |
| Unnamed flooding | 1984 | 13 | 6% |
| Midwest Flooding | 1993 | 1 | 0% |
Flood zone at time of claim
NFIP communities
Federal disaster declarations in Cerro Gordo County
Flood, hurricane and storm declarations since 2000.
5 flood, storm or hurricane declarations for Cerro Gordo County since 2000.
Check a specific address in Mason 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.