Blog · October 14, 2026 · South Dakota
Yankton County Flood Zone Map, South Dakota: a practical guide
The zone on FEMA's map affects insurance, building and resale near Lewis and Clark Lake.
Main page: Yankton County, SD GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Before you buy or build near Volin, check the Yankton County flood zone map: FEMA's zone label affects insurance, building rules and resale. In this Yankton County guide: finding the address on FEMA's map, reading the zone codes, and pairing it with the Yankton County Beacon site.
Getting started with the Yankton County flood zone map
For a more interactive look, use the National Flood Hazard Layer viewer, where zone shading sits over a photo base, which applies near Jamesville Colony as much as anywhere. Vacant ground around Irene is still easy to locate: zoom in from the nearest road and click inside the land.
Opening the official parcel viewer
Begin with the Yankton County Beacon site; it covers every tax parcel from Jamesville Colony to Lesterville. If the land is near Irene, enter a street address, an owner's name or a parcel number, then pick the result to center the map on it. If the land is near Mission Hill, the record panel typically gives the owner of record, acreage on the tax roll, a parcel ID and often a sale date.
Beyond the mapped zones
Small streams around Utica aren't always studied in detail, so walk the land after rain. Wet ground around Irene is a separate issue from flood zones; the National Wetlands Inventory mapper shows mapped wetlands.
Land on the county line
The county touches Cedar County, NE, Knox County, NE, Bon Homme County, Clay County, and Hutchinson County; every one of them runs a separate parcel map around Lewis and Clark Lake. A tract near the line by Gayville can be split in two county records, so look at the neighboring map as well. For a parcel near Utica, the Platbookmapper state page links each bordering county map for South Dakota.
Places you'll see on the map
Yankton serves as the county seat, home to the main records offices. You'll also find Irene, Gayville, Lesterville, and Mission Hill, each with its own cluster of lots. Roughly 23,517 people call Yankton County home (Census estimate, 2023) across roughly 521 square miles. Yankton County dates to 1862, which matters when you trace an old farm's title. Features like Lewis and Clark Lake, Missouri River, and Lewis & Clark Recreation Area make handy reference points on the map.
Which office to call
Recorded documents for a parcel near Irene come from the Register of Deeds, usually searchable by name or document number. Zoning, permits and septic questions near James River need the planning or permitting office, and the answer depends on jurisdiction.
Recorded documents worth pulling
The map is an index, not the title: recorded deeds, plats and easements for land near Lesterville are filed with the Register of Deeds. Long-held tracts around Lewis and Clark Lake may trace back through several deeds, so a title company can sort it out before a purchase.
What to request from a seller
For property near Gayville, request for any Elevation Certificate before closing; getting a quote early avoids surprises.
How land is described here
South Dakota uses the Public Land Survey System, which means a tract near Volin is described by section, township and range. A standard section is about one square mile, roughly 640 acres, with 36 sections to a township, though corrections make some sections near James River odd-sized. Write down the legal description for the tract near Gayville before you request a deed or survey.
What the zone letters mean
Out toward Irene, zones beginning with A or V mark the Special Flood Hazard Area, land with a 1-percent chance of flooding in any year. If you're looking near Jamesville Colony, shaded Zone X is moderate risk, roughly the 100- to 500-year range; unshaded X is minimal risk.
Matching the zone to the lot lines
FEMA doesn't draw property lines, so open the Yankton County Beacon site next for the outline of the tract near Jamesville Colony.
Lenders and permits
In and around Gayville, an Elevation Certificate from a surveyor helps: it compares the building to the BFE. Building or adding on near Volin in a mapped zone often needs a floodplain permit; check with the county or town building office early.
Questions about the Yankton County flood zone map
Is Zone X safe from flooding around Jamesville Colony?
Good question; shaded X is moderate risk and unshaded X is minimal risk; many owners near Lesterville buy coverage anyway.
How do I get a property removed from a flood zone around Lewis and Clark Lake?
Out toward Mission Hill, a Letter of Map Amendment (LOMA) from FEMA can remove a structure on naturally high ground, and lenders accept the result.
How can I tell if a house near Jamesville Colony is in a flood zone?
For most people, look up the spot near Utica in FEMA's National Flood Hazard Layer viewer; no account is needed.
Can I see flood zones on the county Beacon site near Missouri River?
Short answer: a flood layer may appear in the county Beacon site layer list; confirm a lot near Missouri River on FEMA's map either way.
Where do I ask about an assessment near Jamesville Colony?
Closer to Lesterville, values are the Director of Equalization's job; recorded documents belong to the Register of Deeds, while zoning questions go to planning
Open the official Yankton County, SD 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.