Iowa Flood Zone Map
Last updated: August 2026
Iowa faces widespread riverine flooding from the Mississippi, Missouri, Des Moines, Iowa, and Cedar rivers. The state experienced catastrophic flooding in 1993 and 2008, and agricultural land use practices contribute to rapid runoff into river systems.
15 communities participate in FEMA's Community Rating System, qualifying residents for flood insurance discounts of up to 30%.
Iowa has recorded 14,785 NFIP flood insurance claims since 1978, totaling $345.2M in payouts. See how Iowa compares in our nationwide NFIP claims data breakdown.
FEMA Region
Region 7
Also covers Kansas, Missouri, Nebraska
NFIP Policies
10,448
Policies effective in the trailing 13 months (July 1, 2025 - August 16, 2026), not a certified point-in-time count
IA Avg. Premium
$1,276/yr
National average: $915/yr
NFIP Flood Insurance Claims
Iowa properties have filed 14,785 NFIP flood insurance claims totaling $345.2M in payouts since 1978. The average claim payout in 2025 was $22,200.
Recent Years
Claims by Decade
Highest-Claim Years
Claims by Flood Zone
Source: OpenFEMA NFIP Claims API. Data sourced August 2026. See national claims data.
Flood Insurance Coverage in Iowa
Only roughly 1 in 121 households in Iowa carries NFIP flood insurance (0.8% of estimated households). 85 of 99 counties have elevated flood risk but low insurance coverage. With 5,924 recorded flood events and $3.5B in damage, many flood losses in this state are likely uninsured.
Penetration Rate
0.8%
roughly 1 in 121 households
Historical Claims Ratio
1 in 1
14,785 claims over 45+ years across 10,448 current policies
Avg. Claim Payout
$23,350
Per claim, state-wide since 1978
Historically, Iowa has averaged 1.4 claims for every active policy (since 1978). This compares cumulative claims against today's policy count and does not predict future claim likelihood.
Coverage data: NFIP policies as of August 2026, claims since 1978 (August 2026), population from FEMA NRI.
Repetitive Loss Properties in Iowa
Iowa has 1,158 properties with multiple flood insurance losses, including 135 severe repetitive loss properties. 41 properties have received FEMA mitigation funding. Severe repetitive loss is a subset of multiple loss, not a separate count. Data sourced August 2026.
Multiple Loss
1,158
2+ claims within 10 years
Severe Repetitive Loss
135
4+ claims or 2 exceeding value
Mitigated
41
Received FEMA mitigation
By Flood Zone
Zone data available for 1,145 of 1,158 properties.
Source: OpenFEMA NFIP Multiple Loss Properties. Data sourced August 2026.
Flood Insurance Discounts in Iowa
15 Iowa communities participate in FEMA's Community Rating System (CRS), earning flood insurance premium discounts for residents in Special Flood Hazard Areas. CRS classes in Iowa range from 4 to 9, with discounts from 5% to 30%.
Class 4 - 30% discount
Class 5 - 25% discount
Class 5 - 25% discount
Class 6 - 20% discount
Class 6 - 20% discount
Class 7 - 15% discount
Class 7 - 15% discount
Class 7 - 15% discount
Linn County
Class 7 - 15% discount
Story County
Class 7 - 15% discount
Class 8 - 10% discount
Class 9 - 5% discount
Source: FEMA Community Rating System, April 2026. Discounts apply to NFIP policies only. CRS classes and discounts are subject to change.
Federal Flood Disaster History
Iowa has received 31 federal disaster declarations for flooding, hurricanes, severe storms, and coastal storms.
Declarations by Decade
Recent Declarations
Showing 8 most recent of 31 total declarations.
Source: OpenFEMA Disaster Declarations Summaries API. Data sourced August 2026.
Recorded Flood Events in Iowa
NOAA has recorded 5,924 flood events in Iowa since 1996, causing an estimated $3.5B in property and crop damage and 17 deaths.
Total Events
5,924
Total Damage
$3.5B
Fatalities
17
Events by Decade
Costliest Events
Source: NOAA Storm Events Database, 1996-2026. Data sourced August 2026.
Flood Mitigation in Iowa
FEMA has funded mitigation for 4,666 properties in Iowa, investing $271.3M in flood risk reduction. Common mitigation actions include acquisition (buying and demolishing flood-prone structures), elevation (raising buildings above flood level), and safe rooms (wind/storm shelters for tornado and hurricane protection).
Properties by Action
Mitigation by Decade
Source: OpenFEMA Hazard Mitigation Assistance Mitigated Properties. Data sourced August 2026. FEMA records a total payment per grant rather than per property, so the dollar figure is an estimate that splits each grant across the properties it covers; the property count is exact.
Levee Protection in Iowa
The USACE National Levee Database lists 24 levee systems protecting parts of 6 Iowa cities. A system's FEMA accreditation status determines how its protected area is mapped - accredited levees are typically mapped as Zone X, while non-accredited or provisionally accredited (PAL) systems generally leave their protected area in the SFHA.
By Accreditation Status
Largest Protected Areas
Waterloo, IA - East and Evansdale, IA
Provisionally AccreditedProtects: Waterloo - Flood source: Cedar River, Cedar River, Elk Run - 6.42 sq mi
Des Moines, IA - DM-I & SEDM - Pleasant Hill - Lake Red Rock Remedial Works
AccreditedProtects: Des Moines - Flood source: Des Moines River - 4.07 sq mi
Virden Creek (Waterloo) Non-Federal Levee System
AccreditedProtects: Waterloo - Flood source: Virden Creek - 3.24 sq mi
Sioux City - Floyd River RB
AccreditedProtects: Sioux City - Flood source: Floyd River - 1.94 sq mi
Waterloo, IA - SW - Cedar River RB / Black Hawk Creek RB
Provisionally AccreditedProtects: Waterloo - Flood source: Black Hawk Creek, Cedar River - 1.76 sq mi
Sioux City - Floyd River LB
AccreditedProtects: Sioux City - Flood source: Floyd River - 1.68 sq mi
...and 18 more systems tracked in the database.
Source: USACE National Levee Database. Data sourced August 2026. Learn how levees affect flood zone mapping.
Iowa Flood Risk Overview
County-level risk ratings from FEMA's National Risk Index across 99 Iowa counties.
Inland Flood Risk
0 of 99 counties rated high or very high
Hurricane Risk
0 of 70 counties rated high or very high
Source: FEMA National Risk Index, county-level assessment.
Iowa Cities
Explore flood zone information for major cities in Iowa.
Iowa Flood Zone FAQ
How do I check if my Iowa property is in a flood zone?
Enter your IA address in FludZone's free lookup tool. We query FEMA's National Flood Hazard Layer in real-time to show your flood zone designation, whether flood insurance is required, and your property's risk level.
Do I need flood insurance in Iowa?
If your Iowa property is in a Special Flood Hazard Area (SFHA), meaning zones starting with A or V, and you have a federally regulated or government-backed mortgage, federal law generally requires your lender to ensure you carry flood insurance. Properties in Zone X are not subject to the federal mandate but lenders may still require coverage, and it is often recommended given Iowa's flood history.
What are the most common flood zones in Iowa?
The most common FEMA flood zone designations in Iowa are Zone AE, Zone A, Zone X. Each zone reflects a different level of flood risk, from high-risk areas where flood insurance is generally required for federally regulated or government-backed mortgages to lower-risk areas where coverage is optional but recommended.
Can I remove my Iowa property from a flood zone?
Yes, if your Iowa property's natural ground elevation was always above the Base Flood Elevation and FEMA inadvertently mapped it in the SFHA, you can apply for a Letter of Map Amendment (LOMA) through FEMA. For properties in Iowa's AE and A zones, the LOMA process is relatively straightforward when the elevation data supports it. If your property was raised above the BFE with fill, the process is a LOMR-F. A successful LOMA generally removes the federal mandatory flood insurance requirement, but your lender may still choose to require coverage. You'll need an elevation certificate from a licensed surveyor.
Do any Iowa communities offer flood insurance discounts?
Yes, 15 Iowa communities participate in FEMA's Community Rating System (CRS), a voluntary program that rewards communities for exceeding minimum flood mitigation standards. Residents in participating communities can receive NFIP premium discounts of up to 30% in the Special Flood Hazard Area. Properties outside the SFHA also benefit: CRS classes 1 through 6 receive a 10% discount, and classes 7 through 9 receive a 5% discount on NFIP premiums. Check your city's page on FludZone to see if your community participates.
How much does flood insurance cost in Iowa?
The average NFIP flood insurance premium in Iowa is $1,276 per year across 10,448 active policies. Premiums vary by zone: Zone AE policies average $1,421/yr. Under FEMA's Risk Rating 2.0, your specific premium depends on property type, elevation relative to the Base Flood Elevation, and distance to water, not just your flood zone designation.
How many NFIP flood insurance claims has Iowa had?
Iowa has recorded 14,785 NFIP flood insurance claims totaling $345.2M in payouts since 1978. The highest-claim year was 2008, with 3,267 claims and $160.5M in payouts. This history reflects cumulative flood damage to Iowa properties across decades of storm and rainfall events.
How many Iowa properties have flooded repeatedly?
Iowa has 1,158 properties with multiple flood losses. Of these, 135 are classified as Severe Repetitive Loss, meaning they have experienced four or more NFIP claims of $5,000 or more, or two or more claims where the total exceeds the building value. 41 of these properties have been mitigated.
What percentage of Iowa homes have flood insurance?
Only roughly 1 in 121 households in Iowa carries NFIP flood insurance (0.8% of estimated households). 85 counties in Iowa have elevated flood risk but low insurance coverage, indicating a significant protection gap.
Are there levees protecting Iowa cities?
Yes. The USACE National Levee Database lists 24 levee systems protecting parts of 6 Iowa cities. 16 are FEMA-accredited (generally mapped as Zone X), 4 are non-accredited (the protected area stays in the SFHA), and 4 are provisionally accredited (PAL, accreditation in progress). Levee protection is system-specific, not citywide - check a specific city's page or use the address search above for the zone at a specific property.
Understanding Flood Zones
Learn more about the FEMA flood zone designations common in Iowa.
See the Flood Map for Any Iowa Address
Enter a IA address to view its FEMA flood map, zone designation, SFHA status, and insurance requirements.
Disclaimer: Flood risk data on this page is sourced from FEMA datasets including the National Risk Index, NFIP claims and policy records, disaster declarations, and the Community Rating System. These datasets were last extracted on August 2026 and may not reflect the most recent changes. Always verify current flood zone status through FEMA or a licensed determination provider before making property, insurance, or lending decisions.