Ottawa, Kansas Flood Zones
Last updated: March 2026
Ottawa in Franklin County faces riverine flooding from the Marais des Cygnes River. Spring rainfall and upstream runoff can cause the river to rise significantly, threatening properties along the floodplain.
Franklin County has recorded 28 NFIP flood insurance claims since 1978, totaling $681K in payouts. Explore the full NFIP claims data by state and county to see how this area compares nationally.
FEMA Region
Region 7
NFIP Policies
46
Franklin County
Avg. Premium
$1,783/yr
Franklin County
FEMA Flood Risk Profile: Franklin 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 LowEst. annual loss: $7.0M
Source: FEMA National Risk Index, county-level assessment. Individual property risk may vary.
Federal Flood Disaster History: Franklin County
Franklin County has been included in 2 federal flood-related disaster declarations.
These declarations affected communities across Franklin County, including Ottawa.
Source: OpenFEMA Disaster Declarations Summaries API. Data sourced February 2026.
NFIP Flood Insurance Claims: Franklin County
Properties in Franklin County have filed 28 NFIP flood insurance claims totaling $681K in payouts since 1978. The average claim payout is $24K.
Highest-Claim Years
2007
10 claims - $163K
2019
6 claims - $284K
2017
4 claims - $202K
Claims by Flood Zone
Source: OpenFEMA NFIP Claims API. Data sourced March 2026. See national claims data.
What Your Flood Zone Means in Ottawa
Ottawa 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 Ottawa are Zone AE, Zone X. FEMA's National Risk Index estimates the county's annual expected loss from inland flooding at over $7.0M.
Riverine flood risk in Ottawa 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 Ottawa address.
Flood Insurance Discount: Ottawa
Ottawa 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 9
SFHA Premium Discount
5% off
CRS classes range from 1 (best) to 10 (no discount). Ottawa's Class 9 rating means NFIP policyholders in the SFHA can receive up to a 5% discount on their flood insurance premiums. Properties outside the SFHA may receive a 5% discount.
Source: FEMA Community Rating System, October 2025. Discounts apply to NFIP policies only.
Ottawa, KS Flood Zone FAQ
What flood zones are in Ottawa, KS?
The most common FEMA flood zones in Ottawa 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 Ottawa?
If your Ottawa 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 over 40% of all NFIP flood claims come from Zone X properties.
How do I check my flood zone in Ottawa?
Enter your Ottawa 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 Ottawa offer flood insurance discounts?
Yes. Ottawa participates in FEMA's Community Rating System (CRS) with a Class 9 rating, qualifying residents in the Special Flood Hazard Area for up to a 5% discount on NFIP flood insurance premiums. Properties outside the SFHA may receive a 5% discount.
Has Ottawa experienced major flooding events?
Franklin County, where Ottawa is located, has been part of 2 federal disaster declarations for flooding, hurricanes, or severe storms. The most recent was Hurricane Katrina Evacuation in 2005. Federal disaster declarations are issued when flooding overwhelms local resources and triggers FEMA assistance programs.
How many flood insurance claims have been filed in Ottawa?
Franklin County has recorded 28 NFIP flood insurance claims totaling $681K in payouts since 1978. The year with the most claims was 2007, with 10 claims and $163K in payouts. These figures cover all NFIP claims in the county, including Ottawa.
How many flood insurance policies are active in Ottawa?
Franklin County currently has 46 active NFIP flood insurance policies with an average annual premium of $1,783. The most policies are in Zone A (22 policies). These figures cover all active NFIP policies in the county.
Can my Ottawa 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 Ottawa?
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 Ottawa'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.
Other Kansas Cities
Understanding Flood Zones
Look Up Any Ottawa, KS Address
Enter a Ottawa, KS address to instantly check its FEMA flood 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 March 2026 and may not reflect the most recent changes. This page is for informational purposes only and is not a certified flood zone determination. Always verify current flood zone status through FEMA or a licensed determination provider before making property, insurance, or lending decisions.