Evansville, WI Flood Zone Lookup
Last updated: August 2026
Evansville faces flooding from Allen Creek in Rock County. Heavy rainfall events cause creek overflows that threaten low-lying residential areas of the city.
Rock County has recorded 304 NFIP flood insurance claims since 1978, totaling $4.2M in payouts. Explore the full NFIP claims data by state and county to see how this area compares nationally.
FEMA Region
Region 5
NFIP Policies
322
Rock County
Avg. Premium
$1,712/yr
Rock County
FEMA Flood Risk Profile: Rock County
Based on FEMA's National Risk Index, which evaluates flood risk at the county level using historical loss data, exposure, and vulnerability.
Inland Flood Risk
Relatively ModerateEst. annual loss: $37.9M
Hurricane Risk
Very LowEst. annual loss: $4K
Source: FEMA National Risk Index, county-level assessment. Individual property risk may vary.
Federal Flood Disaster History: Rock County
Rock County has been included in 4 federal flood-related disaster declarations.
These declarations affected communities across Rock County, including Evansville.
Source: OpenFEMA Disaster Declarations Summaries API. Data sourced August 2026.
NFIP Flood Insurance Claims: Rock County
Properties in Rock County have filed 304 NFIP flood insurance claims totaling $4.2M in payouts since 1978. The average claim payout is $14K.
Highest-Claim Years
2008
139 claims - $3.4M
1979
49 claims - $102K
1993
14 claims - $80K
Claims by Flood Zone
Source: OpenFEMA NFIP Claims API. Data sourced August 2026. See national claims data.
Flood Insurance Coverage: Rock County
Only roughly 1 in 201 households in Rock County carries NFIP flood insurance (0.5% of estimated households). With 83 recorded flood events and $41.1M in damage, most flood losses in this county are likely uninsured.
Penetration Rate
0.5%
roughly 1 in 201 households
Historical Claims Ratio
1 in 1
304 claims over 45+ years across 322 current policies
Avg. Claim Payout
$13,658
Per claim, county-wide since 1978
Historically, Rock County has averaged 1 claim 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. All figures are county-wide and include Evansville.
What Your Flood Zone Means in Evansville
Evansville faces flood risk primarily from river and stream overflow during heavy rainfall, snowmelt, or upstream dam releases. When rivers exceed their banks, floodwaters spread across low-lying areas mapped in AE and A zones. The most common FEMA flood zone designations in Evansville are Zone AE, Zone X. FEMA's National Risk Index estimates the county's annual expected loss from inland flooding at over $37.9M.
Riverine flood risk in Evansville is driven by the proximity and elevation of properties relative to nearby waterways. Properties closer to rivers with lower ground elevations typically face higher flood insurance premiums under FEMA's Risk Rating 2.0. If your property is in a Special Flood Hazard Area (SFHA) and you have a federally regulated or government-backed mortgage, federal law generally requires your lender to ensure you carry flood insurance.
River flood maps can change when FEMA conducts new Flood Insurance Studies or when development alters drainage patterns. Letters of Map Amendment (LOMA) can remove individual properties if the natural ground elevation was always above the Base Flood Elevation and the property was inadvertently mapped in the SFHA. Use our free lookup tool to check the current flood zone for any Evansville address.
Repetitive Loss Properties: Rock County
Rock County has 14 properties with multiple flood insurance losses, including 1 severe repetitive loss properties. Severe repetitive loss is a subset of multiple loss, not a separate count. Data sourced August 2026.
Multiple Loss
14
2+ claims within 10 years
Severe Repetitive Loss
1
4+ claims or 2 exceeding value
Mitigated
0
Received FEMA mitigation
By Flood Zone
Source: OpenFEMA NFIP Multiple Loss Properties. Data sourced August 2026.
Recorded Flood Events: Rock County
NOAA has recorded 83 flood events in Rock County since 1996, causing $41.1M in damage.
Costliest Events
Events by Type
Source: NOAA Storm Events Database, 1996-2026. Data sourced August 2026.
Flood Mitigation: Rock County
FEMA has funded mitigation for 15 properties in Rock County, investing $1.2M 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).
By Action Type
Source: OpenFEMA Hazard Mitigation Assistance. Data sourced August 2026.
Flood Insurance Discount: Evansville
Evansville participates in FEMA's Community Rating System (CRS), a voluntary program that rewards communities for flood mitigation efforts beyond minimum NFIP requirements. Residents in the Special Flood Hazard Area may qualify for reduced flood insurance premiums.
CRS Class
Class 7
SFHA Premium Discount
15% off
CRS classes range from 1 (best) to 10 (no discount). Evansville's Class 7 rating means NFIP policyholders in the SFHA can receive up to a 15% discount on their flood insurance premiums. Properties outside the SFHA may receive a 5% discount.
Source: FEMA Community Rating System, April 2026. Discounts apply to NFIP policies only.
Evansville, WI Flood Zone FAQ
What flood zones are in Evansville, WI?
The most common FEMA flood zones in Evansville are Zone AE, Zone X. Properties in these high-risk zones (SFHA) may require flood insurance with a federally regulated or government-backed mortgage.
Is flood insurance required in Evansville?
If your Evansville property is in a Special Flood Hazard Area (SFHA) 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 federally required to carry flood insurance, though coverage is still recommended since about 40% of all NFIP flood claims come from Zone X properties.
How do I check my flood zone in Evansville?
Enter your Evansville address in the search tool above for an instant flood zone determination. Results include your FEMA flood zone, SFHA status, base flood elevation (if available), and FIRM panel information, pulled directly from FEMA's National Flood Hazard Layer.
Does Evansville offer flood insurance discounts?
Yes. Evansville participates in FEMA's Community Rating System (CRS) with a Class 7 rating, qualifying residents in the Special Flood Hazard Area for up to a 15% discount on NFIP flood insurance premiums. Properties outside the SFHA may receive a 5% discount.
Has Evansville experienced major flooding events?
Rock County, where Evansville is located, has been part of 4 federal disaster declarations for flooding, hurricanes, or severe storms. The most recent was Severe Storms, Tornadoes, and Flooding in 2026. Federal disaster declarations are issued when flooding overwhelms local resources and triggers FEMA assistance programs.
How many flood insurance claims have been filed in Evansville?
Rock County has recorded 304 NFIP flood insurance claims totaling $4.2M in payouts since 1978. The year with the most claims was 2008, with 139 claims and $3.4M in payouts. These figures cover all NFIP claims in the county, including Evansville.
How many flood insurance policies are active in Evansville?
Rock County currently has 322 active NFIP flood insurance policies with an average annual premium of $1,712. The most policies are in Zone AE (253 policies). These figures cover all active NFIP policies in the county.
How many Evansville properties have flooded repeatedly?
Rock County has 14 properties with multiple flood losses on record, including 1 severe repetitive loss properties. These are properties that have experienced four or more NFIP claims of $5,000+ or two claims exceeding the building value.
Can my Evansville property be removed from a high-risk flood zone?
Yes, if your property's natural ground elevation is above the Base Flood Elevation and FEMA inadvertently mapped it in a high-risk zone, you can apply for a Letter of Map Amendment (LOMA). A successful LOMA removes the property from the Special Flood Hazard Area, generally eliminating the federal mandatory flood insurance requirement. You will need an elevation certificate from a licensed surveyor. If a property was raised above the BFE with fill material, the process is a LOMR-F rather than a LOMA.
What is Base Flood Elevation in Evansville?
Base Flood Elevation (BFE) is the predicted height of floodwaters during a 1% annual chance (100-year) flood, shown on FEMA maps as an elevation number in feet above sea level. In Evansville's Zone AE areas, BFE lines appear on the FIRM as wavy contours labeled with elevation values. Properties with a lowest floor at or above the BFE typically qualify for significantly lower NFIP flood insurance premiums.
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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.