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Flood risk in Illinois

FEMA NFIP historical claims and active policies aggregated by county. Pick a county to see total paid, average claim amount, and active policy count.

Counties with claims
89
of 98 reporting
Total NFIP claims
7,049
Total claims paid
$108,620,721
Active policies
4,607

Highest flood risk counties

Claims per 1,000 housing units. Higher means a larger share of homes have a documented claim on file.

  1. 1.Calhoun County112.86 / 1k
  2. 2.Alexander County42.85 / 1k
  3. 3.Henderson County22.59 / 1k
  4. 4.Iroquois County17.74 / 1k
  5. 5.Jersey County14.87 / 1k
  6. 6.Massac County7.76 / 1k
  7. 7.Mason County7.08 / 1k
  8. 8.Jo Daviess County5.56 / 1k
  9. 9.Gallatin County5.10 / 1k
  10. 10.Rock Island County4.15 / 1k

Lowest flood risk counties

Claims per 1,000 housing units, restricted to counties of at least 25,000 residents.

  1. 1.Effingham County0.00 / 1k
  2. 2.Macoupin County0.06 / 1k
  3. 3.Macon County0.12 / 1k
  4. 4.Champaign County0.16 / 1k
  5. 5.McDonough County0.17 / 1k
  6. 6.Montgomery County0.18 / 1k
  7. 7.Logan County0.18 / 1k
  8. 8.Marion County0.20 / 1k
  9. 9.Kendall County0.23 / 1k
  10. 10.McLean County0.26 / 1k

Counties by historical claims

Sorted by total claims, highest first. Historical totals do not capture uninsured properties or future climate shifts.

How to read this

Historical claims show where NFIP-insured properties have actually filed. They under-count uninsured properties and don't forecast future risk from climate, upstream development, or new mitigation projects. For parcel-specific flood-zone designations, use FEMA's Map Service Center.

Data sources

Disclaimer. HomeRule is not a real estate agent, lender, appraiser, or financial advisor. This content is for educational and informational purposes only. Actual costs vary significantly by property, location, and individual circumstances. Consult qualified professionals for personalized advice.