Blog · October 14, 2026 · Mississippi
Harrison County Flood Zone Map, Mississippi
How to check if a property in Harrison County sits in a FEMA flood zone, and what the answer means for a buyer near Pass Christian.
Main page: Harrison County, MS GIS & Parcel Viewer (official map link, Harrison County facts and neighboring maps).
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Is that lot in Biloxi in a flood zone? The Harrison County flood zone map answer comes from FEMA, and it is free to look up. Here's how to read FEMA's map for a Harrison County, MS property and match it to the parcel record.
Below are the FEMA links, a plain reading of the zone labels, notes on where water shapes land around Biloxi, and short answers to common questions.
How to use the Harrison County flood zone map
FEMA's official flood maps for Harrison County are free at the FEMA Flood Map Service Center. The site returns the effective Flood Insurance Rate Map (FIRM) panel covering that Gulfport location, which you can view or download. For an irregular lot near Biloxi, FEMA's National Flood Hazard Layer viewer draws the zones over aerial imagery, so you can see if the shading reaches a house near Biloxi. Switch to the Harrison County parcel viewer and track down the same piece of ground near Biloxi. If the Harrison County viewer has a floodplain layer, treat it as a convenience copy and confirm on FEMA's map.
Finding the tract on the Harrison County map
Harrison County publishes its parcels on the Harrison County parcel viewer, free to use for a lot in Long Beach or a piece of ground near Biloxi. Click any Harrison County parcel near Long Beach to open its record: owner, parcel ID and assessed acreage are most frequently listed. Bookmark our Harrison County page too; it tracks the official Mississippi link if it moves and lists the maps around Long Beach.
Zone A, AE and X in plain English
On the FIRM covering Harrison County, zones that start with A or V are Special Flood Hazard Areas, defined by a 1-percent annual chance of being flooded. Where a Harrison County tract displays Zone AE, there's a base flood elevation to compare a building against; in Zone A there is not one. If a Harrison County parcel displays shaded Zone X, it falls between the base flood and the 500-year flood. Unshaded X (or C) on the Harrison County panel means minimal risk.
Where water shapes land in Harrison County
The Harrison County landscape includes Tchoutacabouffa River and Biloxi Bay, and that's where flood questions cluster. Waterfront and bottomland parcels near Gulfport frequently carry a zone along one edge, so check where the buildable part sits. Small streams and ditches near Gulfport may not be studied in detail, which is why it is worth walking the ground after a heavy rain.
A short buyer checklist for Long Beach
Request any past flood claims history for a Harrison County property before closing; it tells you more than the map alone. Then call an insurance agent who writes policies around Long Beach and get a quote using the zone and the county parcel address.
What a flood zone means for a Harrison County buyer
The zone displays up again when a loan on a house near Biloxi is underwritten. If a barn or house outside Gulfport falls inside an A or V zone and carries a federally backed mortgage, the lender must require flood coverage, as long as Harrison County or the town participates in the NFIP. For a Harrison County home in shaded or unshaded X, insurance is a choice, not a mandate, although some lenders require it anyway. When a Harrison County homesite is on a rise inside a mapped zone, the owner can ask FEMA for a Letter of Map Amendment (LOMA), supported by elevation data from a licensed land surveyor. Placing fill on low ground near Gulfport has to meet local floodplain rules; the county floodplain administrator can say what applies.
Harrison County flood zones questions
Is Zone AE near Long Beach high risk?
Zone AE on a lot in Gulfport is a mapped 100-year floodplain with a base flood elevation, so mandatory insurance rules apply to federally backed mortgages.
Does a 100-year floodplain near Long Beach flood only once a century?
Not at all; a Harrison County tract in that zone faces a 1-percent annual chance, not a once-a-century schedule.
Is my Gulfport address in a flood zone?
Search the Gulfport address on FEMA's Flood Map Service Center; the effective panel displays the zone, and the county parcel map confirms the tract.
My house near Long Beach is in Zone X. Is insurance required?
For a Zone X house near Long Beach, federal rules don't require flood insurance; buying it is still a choice worth pricing.
What is a base flood elevation for a Harrison County property?
On the map covering Gulfport, the base flood elevation marks how high the 100-year flood is expected to rise, and it is printed in AE zones.
Can a flood zone in Harrison County be changed?
For a lot in Gulfport, hire a surveyor for an elevation certificate, then file a LOMA request with FEMA.
Open the official Harrison County, MS parcel map Harrison County in the Platbookmapper directory
Not a survey. County GIS and tax parcel maps are assessment and planning layers. They are not a substitute for a recorded plat, deed, or licensed survey, especially for fences, setbacks, or boundary disputes.