Blog · October 14, 2026 · Ohio
Marion Flood Zone Map, Ohio: a practical guide
Flood zones are set by FEMA, and checking one near Green Camp takes a few minutes.
Main page: Marion County, OH GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Before you buy or build near Morral, look at the Marion flood zone map: the zone on that map shapes insurance, permits and resale. What this Marion guide covers: finding the address on FEMA's map, decoding A, AE and X, and confirming the outline on the county map.
The Marion flood zone map: start here
Start with FEMA's Flood Map Service Center: search an address around Green Camp, and choose the dynamic map. A tract near Morral without an address can still be found: search the nearest road and click inside the land.
The free map to start with
Go first to the Ohio Statewide Parcels layer in ArcGIS Map Viewer; it maps each tax parcel around Waldo and Caledonia. When a rural tract has no street number, follow US Route 23 on the aerial until the lines appear, then click inside the one you want. On ground around Caledonia, the parcel card typically gives the owner of record, acreage on the tax roll, the parcel number and in many cases the last transfer.
Legal descriptions in Ohio
Rural deeds near Waldo commonly use metes-and-bounds descriptions, which trace the boundary call by call. Platted lots around Waldo are typically described by lot and block, making them easier to find. Write down the legal description for the tract near Morral when you talk to a surveyor.
Where Marion fits in
Marion lies within Marion County, Ohio, and the county assessor maps its lots. As the county seat, Marion hosts the courthouse, handy when you need recorded documents. On ground around Morral, city or town hall handles matters such as zoning, permits and utilities within town limits, while the county keeps the tax map. Acreage past the city limits near Prospect usually falls under county rules instead.
Zones on the Marion flood zone map
An AE label comes with a base flood elevation, which plain A zones lack; that elevation drives building rules near Caledonia. If the land is near New Bloomington, minimal risk is not no risk: FEMA notes that many claims come from moderate- and low-risk areas.
Matching the zone to the lot lines
FEMA doesn't draw property lines, so open the Ohio Statewide Parcels layer in ArcGIS Map Viewer next for the outline of the tract near Prospect.
Getting your bearings
Marion is the county seat, which is where the courthouse records live. You'll also find Green Camp, Morral, Caledonia, and Waldo, each with its own cluster of lots. About 64,851 people call Marion County home (Census Bureau estimate, 2023) on roughly 404 square miles. Marion County was organized in 1820, and some chains of title near Waldo are long.
The paper trail behind a parcel
When the details count, pull the recorded deed through the County Recorder; the parcel map near New Bloomington only summarizes it. On ground around Waldo, have ready the instrument number from the tax record to skip a name search.
Land on the county line
Marion County touches Crawford County, Delaware County, Hardin County, Morrow County, and Union County, all with their own assessor records. Ground near Waldo that runs to the line may be split in two county records, so open the neighboring map too. If the land is near Morral, our state page links every neighboring county map for Ohio.
Water near Prospect
Small streams around Green Camp may not have detailed mapping, so ask neighbors about past flooding. Wetlands near Green Camp can limit building even outside a flood zone; check the National Wetlands Inventory mapper for a first look.
Taking the map into the field
Most viewers work in a phone browser, handy when you're parked on a road near Green Camp, so load it before you lose signal. A saved image of the lot near New Bloomington and its lines is a good backup.
What to request from a seller
Ask the seller about past flood claims for the house near New Bloomington; an insurance quote early avoids surprises.
What a flood zone means for a buyer
If you're looking near Green Camp, get the Elevation Certificate if one exists: it compares the building to the BFE. Remodeling a house in a zone near Caledonia usually means extra permit review; call the permitting office early.
Frequently asked
Is Zone X safe from flooding near New Bloomington?
Good question; X zones around Waldo are lower risk, not no risk; FEMA notes that a large share of claims come from these areas.
Does the county parcel map show flood zones around Prospect?
Short answer: a flood layer may appear in the Ohio Statewide Parcels layer in ArcGIS Map Viewer layer list, though it can lag behind FEMA's current panels.
Will my lender require flood insurance near Waldo?
Good question; for a building near Caledonia in an A or V zone with a federally backed or regulated mortgage, it's generally required, in communities that take part in the NFIP.
Is AE a high-risk flood zone for land near Caledonia?
Good question; an AE zone has a 1% annual chance of flooding and a base flood elevation, which shapes building rules near Green Camp.
Where do I ask about an assessment near Morral?
The County Auditor handles values and the tax roll, and the County Recorder keeps deeds; planning offices cover zoning near Prospect
Open the official Marion County, OH parcel map See it 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.