Blog · October 14, 2026 · South Dakota
Todd County Flood Zone Map in South Dakota
How to check if a property in Todd County sits in a FEMA flood zone, and what the answer means for a buyer near St. Francis.
Main page: Todd County, SD GIS & Parcel Viewer (official map link, Todd County facts and neighboring maps).
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The Todd County flood zone map question tends to arrive at a bad moment: a lender's letter, an insurance quote, or a permit counter in St. Francis. Here's how to read FEMA's map for a Todd County, SD property and match it to the parcel record.
We'll cover finding a Todd County address on FEMA's map, what Zone A, AE and X mean, how the county viewer fits in, and what to do if the map looks wrong.
Look up the Todd County flood zone map step by step
Start at the FEMA Flood Map Service Center and enter the property address in Winner or anywhere else in the county. Search returns the effective FIRM panel for the spot in Todd County, plus any pending changes FEMA has posted. On acreage outside Winner, try FEMA's National Flood Hazard Layer viewer, which lists how much of a county parcel sits inside the zone. Switch to the District III regional GIS map and track down the same tract close to Mission. If the Todd County viewer has a floodplain layer, treat it as a convenience copy and confirm on FEMA's map.
Step one: the free Todd County viewer
For land around Winner, open the District III regional GIS map (the District III planning district web GIS); it's the map Todd County itself publishes. Most people track down their Todd County tract fastest by searching an address in Winner, then clicking the outline. Our Todd County, SD page keeps the official link and the maps next door to Winner in one place.
Reading the zones on a Todd County flood map
For a lot in Winner, the label matters more than the color: A and V zones are Special Flood Hazard Areas, land with a 1-percent chance of flooding in any given year (the base or 100-year flood). Zone AE near Mission means FEMA published a base flood elevation; plain Zone A means no detailed elevation was studied. Shaded Zone X around Winner sits in the moderate band between the 100-year and 500-year floods. Unshaded X (or C) on the Todd County panel means minimal risk.
Low ground and small streams around Winner
Small streams and ditches near Winner may not be studied in detail, which is why it's worth walking the ground after a heavy rain.
Questions to ask before buying in Todd County
Request any past flood claims history for a Todd County property before closing; it tells you more than the map alone. Quotes for land near Okreek depend on the zone and the building's elevation, so bring both to the agent.
Floodways and restudies near Mission
Look at the effective date printed on the county panel, since a new study can redraw zones around Winner. If a tract close to Mission lists a hatched floodway, expect tight limits on fill and new structures from the county floodplain office.
When the map affects a deal
Insurance is the practical stake for a Todd County buyer. If a barn or house outside Winner sits in a Special Flood Hazard Area and carries a federally backed mortgage, the lender must require flood coverage; that applies where the local government around Mission is in the National Flood Insurance Program. Outside the A zones around Mission, insurance is a choice, not a mandate, although some lenders require it anyway. Think the map is wrong about a house in Winner? The owner can ask FEMA for a Letter of Map Amendment (LOMA); a surveyor near Mission can supply the elevation data. Adding on to a house near Mission inside the zone typically needs a floodplain permit, so call the county or the town office in Winner before work starts.
Quick answers for Todd County
Where can I see flood zones for land near Winner?
Look it up at FEMA's Flood Map Service Center, then match the parcel lines in the District III regional GIS map; for land near Winner, a zone starting with A or V is high risk.
Can I see flood zones on the Todd County GIS map?
Check the layer list in the District III regional GIS map; if Todd County includes a floodplain layer, confirm the zone on FEMA's map anyway.
Is Zone AE near Winner high risk?
Zone AE on a lot in Mission is a mapped 100-year floodplain with a base flood elevation, so mandatory insurance rules apply to federally backed mortgages.
My house near Winner is in Zone X. Is insurance required?
Not under federal rules; Zone X in Todd County is outside the Special Flood Hazard Area, though a lender can still require coverage.
What does 100-year flood mean for Todd County land?
No, ground around Mission mapped that way faces a 1-percent annual chance, not a once-a-century schedule.
What does BFE mean on the flood map for Mission?
Near Winner, it's the projected water surface in the base flood; elevation certificates in Todd County are measured against it.
Open the official Todd County, SD parcel map Todd 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.