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Flood Zone Checker - Is Your Address in a Flood Zone?

Enter an address or click the map to check FEMA flood zone designation and risk level. See if flood insurance is required for any US location.

By Dan Rossall · Updated

Free FEMA Flood Zone Lookup for Any US Address

Find out if a property is in a FEMA flood zone by entering the address or clicking on the map. The tool queries the official National Flood Hazard Layer (NFHL) and shows the flood zone designation, risk level, and whether flood insurance is required.

The result also gives the FEMA map panel (the Flood Insurance Rate Map sheet that covers the address) and the date it took effect, which lenders and insurers quote, and says how current the flood zone data is. Zoom in on the map to see the flood zones drawn across the whole area. No account needed.

Who Uses This Tool?

Homebuyers

Check flood risk before making an offer. In a high-risk zone, flood insurance is required with a federally backed mortgage; get a price for the address from FEMA's FloodSmart site before you commit.

Homeowners

See your current flood zone and whether your area has been remapped. FEMA updates flood maps regularly, and your zone may have changed.

Real Estate Agents

Quickly check flood zones for listings and client questions. Share results via a link.

Insurance Agents

Look up flood zones for quoting. See base flood elevations where available.

Renters

Check flood risk for apartments and rentals. Renters can also buy flood insurance through the NFIP.

Investors & Developers

Assess flood risk for potential acquisitions and development sites. Zoom in on the map to see flood zones across an area.

Understanding FEMA Flood Zones

FEMA classifies areas into flood zones based on the likelihood and severity of flooding:

High-Risk Zones (Special Flood Hazard Areas)

  • Zone A - 1% annual chance of flooding (100-year floodplain). No base flood elevation determined.
  • Zone AE - Same as Zone A, but with base flood elevations determined by detailed study.
  • Zone AH - Shallow flooding (1-3 feet) with a 1% annual chance. Typically ponding areas.
  • Zone AO - Sheet flow flooding on sloped terrain with a 1% annual chance.
  • Zone V / VE - Coastal flood zones with wave action hazard. The most dangerous flood zones.

Moderate to Low Risk Zones

  • Zone X (shaded) - 0.2% annual chance of flooding (500-year floodplain). Moderate risk.
  • Zone X (unshaded) - Outside the 500-year floodplain. Minimal flood risk.
  • Zone D - Undetermined risk. No flood hazard analysis has been conducted.

Features

  • Instant flood zone lookup - Enter any US address to see the FEMA flood zone designation
  • Risk level and insurance info - See whether flood insurance is required for your zone
  • Click-to-check - Click anywhere on the map to check that location
  • Flood zones on the map - Zoom in to see high-risk, moderate-risk and undetermined zones drawn across the area
  • FEMA map panel and date - The Flood Insurance Rate Map panel number and its effective date for the point you checked
  • ZIP code view - Enter a ZIP code to move the map there with flood zones shown (no zone is given for a ZIP)
  • Official FEMA flood map - Open the FEMA NFHL viewer centered on your location for detailed zone boundaries
  • Base flood elevation - Shows BFE data where FEMA has determined it
  • Shareable links - Generate a URL for any checked location
  • Official data - Uses FEMA's National Flood Hazard Layer, the same source used by lenders
  • Geolocation - Use your current location for instant results

About the Flood Data

This tool queries the FEMA National Flood Hazard Layer (NFHL), the official digital flood hazard database for the United States. The NFHL contains flood zone boundaries from Flood Insurance Rate Maps (FIRMs) and is the same data used by mortgage lenders, insurance companies, and local governments.

The tool asks FEMA's NFHL map service for the zone at your point. If FEMA does not answer, it uses Esri's Living Atlas copy of the NFHL instead, and the result says which one it used: for Esri's copy, the date Esri last changed it. The result also gives the FEMA map panel for the point and the date that panel took effect.

FEMA updates flood maps on a rolling basis as new studies are completed. Some areas are not mapped yet, and Esri's copy also leaves out Zone X areas of minimal flood hazard and Zone D (not studied). A point with no zone shows "Not Listed" with a link to FEMA's map. That does not mean there is no flood risk.

For official flood zone determinations for lending purposes, contact a licensed flood zone determination company. This tool is for informational purposes only.

Frequently Asked Questions

How do I check if my house is in a flood zone?

Enter your full street address in the search box and click "Check Flood Zone." The tool queries FEMA's National Flood Hazard Layer and shows your flood zone designation, risk level, and whether flood insurance is required. You can also click directly on the map or use the "My Location" button. A ZIP code moves the map to that ZIP with the flood zones drawn on it, but gives no zone; a city name alone isn't accepted. See "How accurate is this flood zone data?" below for why.

What do FEMA flood zone letters mean?

Zones A, AE, AH, AO, V, and VE are high-risk Special Flood Hazard Areas (SFHAs) with a 1% annual chance of flooding. Zone X (shaded) is moderate risk with a 0.2% annual chance. Zone X (unshaded) is minimal risk. Zone D means risk is undetermined.

Is flood insurance required for my property?

If your property is in a Special Flood Hazard Area (any zone starting with A or V) and you have a federally backed mortgage, flood insurance is required by law. Outside those areas it is not required, but floods still happen there: over 2014 to 2024, 29% of National Flood Insurance Program claims came from outside high-risk flood areas (FEMA's FloodSmart site).

How accurate is this flood zone data?

This tool uses FEMA's official NFHL data, the same source used by lenders and insurance companies, checked against the exact point you searched. Because a flood zone can change within a single block, it only answers for a full street address resolved to street level or better, or a point you click or share directly - a ZIP code or place name is too coarse and could show a different, wrong zone for your actual address. If your address can't be confirmed precisely enough, the tool refuses rather than guess, and points you to FEMA's own map instead. Maps are updated regularly but may not reflect the most recent changes. For official determinations for lending, use a licensed flood zone determination company.

Is my data stored?

Your address is first matched against our own address data, in your browser. If it isn't found there, it is sent to our server, which asks the US Census Bureau and then Geocodio for its coordinates. The point (not the address) then goes through our server to Esri's and FEMA's flood map services, and a point you click or locate is sent to OpenStreetMap's Nominatim to name it. A ZIP code is looked up in our own ZIP file in your browser. When the map is zoomed in, the map area on screen goes through our server to Esri's flood map service to draw the flood zones. We don't log your searches. If Geocodio finds it, we keep the coordinate it found for 24 hours, filed under a one-way hash of the address rather than the address itself, so a repeat search doesn't need to ask again; nothing records who searched or when.

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