Zone D means nobody has measured the flood risk yet. Here is what that means. Paste an address below to see its FEMA flood zone, or a whole list to check them all at once.
Quick answer
Flood zone D is an area where flood risk is possible but undetermined: FEMA hasn't done a flood hazard analysis there. It is not a high-risk zone on the map, so federal law doesn't require flood insurance, but the risk is unknown rather than low, and insurers and lenders treat it with caution.
Step 1 of 2 · about a minute
Or paste one address per line
US addresses with a house number and a state or ZIP. Only the address is used for the check.
Mostly in sparsely developed areas, and in places like some mountain areas or federal lands, where a flood study hasn't been worth the cost. The flood risk may be anything from minimal to high.
Flood insurance is available in communities that take part in the National Flood Insurance Program, and is priced on the property's own risk. Because the risk is unstudied, it's worth checking how close the property is to water and how high it sits before you buy.
A guide and a planning check, not an official flood zone determination: a lender's determination, or FEMA's own map, is the official answer for a single property.
What does flood zone D mean?
Possible but undetermined flood risk: FEMA hasn't analysed the area.
Do I need flood insurance in zone D?
Federal law doesn't require it, because zone D isn't mapped as high risk, but a lender can ask for it and the risk is unknown rather than low.
Is zone D high risk?
Not necessarily: it's unstudied. It could be minimal or high.