Walthall County, MS zoning map, flood zone and property lines by address
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Towns in Walthall County: Tylertown.
Flood zone by address
ParcelSheet reads FEMA's National Flood Hazard Layer at the lot: the zone, whether it is a high risk area where lenders ask for flood insurance, and the base flood elevation where FEMA lists one. FEMA's countywide study for Walthall County has 16 FIRM panels, the newest effective October 2019; no coastal V zones are mapped in it.
The official panel and any Letter of Map Amendment are at FEMA's Map Service Center. An elevation certificate for a Walthall house comes from a licensed surveyor and is often on file with the county or city building office.
Property lines
The parcel outline, parcel number and mapped size come from the Mississippi county parcel layers (each county publishes its own), so a Walthall lot shows the same lines the county tax assessor draws. Walthall County covers about 258,514 acres of land and 306 acres of water.
Mapped lines are approximate. The Walthall County tax assessor keeps the parcel record (Walthall County website); a licensed surveyor sets the true corners.
Zoning
Walthall County zones its unincorporated land, and Tylertown zones the land inside its limits. ParcelSheet shows the use the county tax assessor lists for the lot and links the county planning or zoning office for the district, the uses it allows and the lot size it needs.
ADU and guest houses
Under Mississippi's zoning and planning law (Mississippi Code Title 17, Chapter 1), local governments can allow an accessory dwelling unit on a lot with a house. Whether a Walthall lot can add one depends on its district; the county planning or zoning office has the rule. ParcelSheet shows the mapped lot size and the ground's slope, the first two things the question turns on.
Septic and soil
ParcelSheet reads the USDA soil survey at the lot: the soil's name, its septic absorption rating and whether it is prime farmland. Walthall County is soil survey area MS147, Walthall County, Mississippi, last updated September 2026, on Web Soil Survey.
A new or changed septic system in Walthall County needs approval from the Walthall County health department environmentalist (Mississippi State Department of Health on-site wastewater program).
Setbacks
Setbacks in Walthall County come from the zoning district: the front, side and rear distances a house must keep. ParcelSheet does not draw setback lines; the county zoning office gives them for the lot's district, and Tylertown for land inside its limits.
Hazards that apply
- Wetlands and wildfire. ParcelSheet shows the National Wetlands Inventory near a Walthall lot and the Forest Service wildfire hazard rating at it.
Questions
Is my house in a flood zone in Walthall County?
Type the address in the box above and ParcelSheet reads FEMA's flood zone at the lot's center. FEMA's countywide flood map for Walthall County has 16 panels, the newest effective October 2019. A lender or insurer uses the official FIRM panel; FEMA's Map Service Center has it.
How do I find property lines in Walthall County?
Open the Mississippi map, type the address, and the parcel outline from the Walthall County tax assessor shows on the map with its parcel number and mapped size. Mapped lines are approximate; only a licensed surveyor sets the true corners.
What is my property zoned in Walthall County?
Zoning in Walthall County is set by the county for unincorporated land and by each city (such as Tylertown) inside its own limits. ParcelSheet shows the use code the county tax assessor lists and links the office that sets the zoning; the planning office has the final word.
Can I build an ADU in Walthall County?
Under Mississippi's zoning and planning law (Mississippi Code Title 17, Chapter 1), counties and cities can allow an accessory dwelling unit, and each sets its own rules. In Walthall County ask the zoning office for the lot's district first; ParcelSheet shows the lot size as mapped so you can see the room you have.
Do I need a septic permit in Walthall County?
Yes. A new or changed septic system in Walthall County needs approval from the Walthall County health department environmentalist (Mississippi State Department of Health on-site wastewater program). ParcelSheet shows the USDA soil survey's septic rating at the lot, from survey area MS147 (Walthall County, Mississippi).
What can I build on 5 acres in Walthall County?
Zoning in Walthall County is set by the county for unincorporated land and each city inside its own limits (such as Tylertown). The zoning district decides the uses, how many homes and the smallest lot it allows on 5 acres. ParcelSheet shows the lot size as mapped and the use code on the parcel record; the planning office has the district and its rules. See the Walthall County website.
What are the residential setbacks in Walthall County (2026)?
Setbacks in Walthall County come from the zoning code of the county, or of the city when the lot is inside city limits: the front, side and rear distances depend on the lot's district. ParcelSheet does not draw setback lines or give a number it did not read; the zoning office gives them for the district. See the Walthall County website.
Next to Walthall County: Lawrence County, Lincoln County, Marion County, Pike County.
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