Wisconsin has about ~18,000 active NFIP flood insurance policies, with an average annual premium of $580/yr under FEMA's Risk Rating 2.0 methodology. The biggest flood risk areas in the state are Lake Michigan shoreline (Milwaukee, Sheboygan), Wisconsin River valley, Mississippi River border, southwest Wisconsin coulees. Private flood market availability: Limited.
NFIP Policies in Force
~18,000
Estimate, federal flood program
Avg NFIP Premium
$580/yr
Risk Rating 2.0 average
Private Flood Market
Limited
Carrier availability for higher limits
| Topic | Detail | Notes |
|---|---|---|
| Top risk areas | Lake Michigan shoreline (Milwaukee, Sheboygan), Wisconsin River valley, Mississippi River border, southwest Wisconsin coulees | Mandatory purchase in SFHA + federal mortgage |
| Recent major flood | 2018 southwest Wisconsin catastrophic flooding (Aug 2018) | Drives claim data and premium revisions |
| Average NFIP premium | $580/yr | Risk Rating 2.0 phased increases (18%/yr cap) |
| CBRS coastal restrictions | No major CBRS zones | Mostly inland flood exposure |
NFIP statistics from FEMA's national insurance data; premium averages reflect Risk Rating 2.0 phase-in. Private flood market sized from state department of insurance filings. Always verify your specific property's flood zone at floodsmart.gov.
Wisconsin's flood risk spans several distinct environments: the coulee region of southwest Wisconsin, where narrow valleys cut through the Driftless Area's unglaciated terrain create conditions for catastrophic flash flooding from intense convective events; the Lake Michigan shoreline from Kenosha through Milwaukee, Sheboygan, and Green Bay, where wave action and seasonal high water levels threaten bluff communities; the Mississippi River corridor forming Wisconsin's western border; and the Wisconsin River valley running through the state's center. The August 2018 flooding in Dane, Iowa, and surrounding counties in southwest Wisconsin was one of the most damaging in state history — multiple communities in the coulee country experienced floods exceeding any previous recorded event, with the community of Viola in Richland County among the hardest hit. Milwaukee's urban flooding from Lake Michigan and from internal drainage system overwhelm during extreme rain events is a recurring issue.
Wisconsin has approximately 18,000 NFIP policies, distributed across Lake Michigan shoreline counties (Milwaukee, Ozaukee, Sheboygan), Mississippi River border counties (La Crosse, Crawford), and the Wisconsin River valley counties. Risk Rating 2.0 brought moderate changes to Wisconsin, with Lake Michigan shoreline properties seeing the most significant adjustments as FEMA updated Great Lakes coastal modeling. The statewide average of approximately $580 per year reflects the inland, non-ocean character of Wisconsin's primary flood risk. Private flood insurance has minimal presence in Wisconsin.
Homeowners and renters policies categorically exclude flood damage. You must purchase a separate flood policy through the National Flood Insurance Program (NFIP) or a private flood insurer. Note: there's a standard 30-day waiting period from purchase to coverage, so don't wait until a storm is forecast.
NFIP residential policies cap building coverage at $250,000 and contents at $100,000. Homes worth more than these limits should consider 'excess flood' coverage through a private insurer or a fully-private flood policy with higher limits.
Major flood event affecting Wisconsin: 2018 southwest Wisconsin catastrophic flooding (Aug 2018). Repeated severe events tend to push up local NFIP premiums and shift more properties into mandatory-purchase Special Flood Hazard Areas.
💡 Wisconsin Pro Tip
Flood insurance is required for federally backed mortgage holders in Wisconsin SFHAs — including Lake Michigan shoreline zones in Milwaukee, Ozaukee, Sheboygan, and Door counties, the Mississippi River floodplain in La Crosse, Crawford, and Grant counties, the Wisconsin River floodplain in Portage and Sauk counties, and mapped floodplain areas along the Rock, Fox, and other rivers. Coulee country homeowners in Vernon, Richland, and Sauk counties should note that the 2018 floods affected properties outside mapped zones. Wisconsin homeowners near any stream or river should evaluate coverage.
Wisconsin's average NFIP premium is approximately $580 per year. Lake Michigan shoreline properties in Milwaukee or Sheboygan in high-risk zones typically pay $700–$1,500. Mississippi River border community properties in La Crosse or Prairie du Chien pay $600–$1,300. Wisconsin River floodplain properties in Wisconsin Dells or Portage pay $600–$1,200. Zone X properties in lower-risk areas can access Preferred Risk Policies at $350–$550.
NFIP flood insurance in Wisconsin covers flash flooding from intense convective summer storms in the coulee country and elsewhere, riverine flooding from the Mississippi, Wisconsin, Rock, and Fox rivers, Great Lakes high-water and storm-wave flooding in Lake Michigan shoreline communities, surface water inundation from intense rainfall exceeding urban drainage in Milwaukee and other cities, and mudflow caused by flooding. It does not cover Lake Michigan wave action and erosion without associated general flooding, sewer backup or sump pump failure without an external flood trigger, or basement seepage from high groundwater. Wisconsin's spring snowmelt flooding in river corridors is also a covered peril.
Data sourced from FEMA NFIP statistics and state Department of Insurance filings for Wisconsin, April 2026.
Michael Torres
Editorial Lead, Catastrophe & Commercial Property
This article was researched and written by the Cover Forge USA editorial team against federal sources (NAIC, CMS, FEMA, DOL, SSA, state DOIs) and standard policy forms. Bylines organize content by topic — they do not assert individual licensure. See our editorial-policy for details.
Reviewed April 2026
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