Blog · October 14, 2026 · Tennessee
The Marshall County Flood Zone Map: a Tennessee guide
FEMA's free flood maps and the Marshall County parcel viewer, used together for property near Petersburg.
Main page: Marshall County, TN GIS & Parcel Viewer (official map link, Marshall County facts and neighboring maps).
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A Marshall County flood zone map check belongs in the due diligence for any Marshall County property, from a house lot in Lewisburg to farm ground near Cornersville. Here's how to read FEMA's map for a Marshall County, TN property and match it to the parcel record.
Next: FEMA's search tool, the zone labels you'll see for Marshall County, and how the parcel record confirms which tract you're on.
Where to see the official Marshall County flood zone map
Open the FEMA Flood Map Service Center and type a county street address, say one in Petersburg. Download the FIRM panel FEMA lists as effective for that part of Marshall County. On acreage outside Petersburg, FEMA's National Flood Hazard Layer viewer draws the zones over aerial imagery; zoom to the property near Cornersville and click. Switch to the Tennessee Property Viewer and find the same property near Cornersville. Laying the county parcel outline beside the FEMA shading displays if a homesite near Cornersville sits above or inside the zone.
Search Marshall County parcels by owner, address or ID
Marshall County parcels are viewed through a statewide map, the Tennessee Property Viewer; zoom toward Cornersville to reach them. After selecting Marshall County, results show the map, group and parcel numbers used on Tennessee tax records for land near Chapel Hill. For a backup route to the map covering Chapel Hill, our Marshall County directory entry keeps the link current.
Reading the zones on a Marshall County flood map
For a lot in Petersburg, the label matters more than the color: A and V zones are Special Flood Hazard Areas, defined by a 1-percent annual chance of being flooded. Zone AE near Cornersville means FEMA published a base flood elevation; plain Zone A means no detailed elevation was studied. Shaded Zone X around Petersburg falls between the base flood and the 500-year flood. Unshaded Zone X near Cornersville is minimal risk.
Unmapped creeks in Marshall County
A creek near Cornersville that displays no detailed zone, so treat an unmapped channel as a reason to ask questions, not proof the ground stays dry.
Seller questions about flood history
For a house near Petersburg, ask the seller for any elevation certificate on file and the current flood insurance declarations page. An agent working in Marshall County can quote flood coverage once you know the zone for the lot near Petersburg.
Reading the fine print on a Marshall County panel
When FEMA restudies streams in the county, preliminary maps are posted before they take effect, and a lot near Caney Spring can move in or out of a zone. If a property near Lewisburg displays a hatched floodway, expect tight limits on fill and new structures from the county floodplain office.
What drives land use around Lewisburg
In 2022 the Census Bureau tallied 562 establishments in Marshall County; retail trade topped the list. Transportation equipment manufacturing and computer and electronic product manufacturing make up an above-average share of Marshall County businesses, a clue to how land around Chapel Hill gets used.
What a flood zone means for a Marshall County buyer
Insurance is the practical stake for a Marshall County buyer. Where a building in Petersburg falls inside an A or V zone and secures a loan from a federally regulated or insured lender, federal rules call for flood insurance, as long as Marshall County or the town participates in the NFIP. Outside the A zones around Cornersville, federal rules don't require a policy, although some lenders require it anyway. Where a structure near Petersburg looks higher than the shading suggests, a Letter of Map Amendment request is the formal route, supported by elevation data from a licensed land surveyor. Placing fill on low ground near Petersburg most often needs a floodplain permit, so call the county or the town office in Petersburg before work starts.
Marshall County flood zones questions
Is flood insurance required for a Zone X lot in Cornersville?
Not under federal rules; Zone X in Marshall County is outside the Special Flood Hazard Area, though a lender can still require coverage.
Does the Marshall County parcel map show flood zones?
Check the layer list in the Tennessee Property Viewer; if Marshall County includes a floodplain layer, confirm the zone on FEMA's map anyway.
Can I build in a flood zone in Marshall County?
Building in a Special Flood Hazard Area near Cornersville most often needs a floodplain permit and may require elevating the structure, so check with the county floodplain administrator.
What is a base flood elevation for a Marshall County property?
For a county property in Zone AE, the base flood elevation marks how high the 100-year flood is expected to rise, and a surveyor compares the building near Cornersville to it.
How do I challenge a flood zone for a lot in Cornersville?
For a lot in Cornersville, hire a surveyor for an elevation certificate, then file a LOMA request with FEMA.
Open the official Marshall County, TN parcel map Marshall 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.