Blog · October 14, 2026 · South Dakota
Using the Gregory County Flood Zone Map
The zone on FEMA's map affects insurance, building and resale near Randall Creek Recreation Area.
Main page: Gregory County, SD GIS & Parcel Viewer (official map link, county facts and neighboring maps).
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Before an offer near St. Charles, look at the Gregory County flood zone map: FEMA's zone label affects insurance, building rules and resale. Covered here for Gregory County: locating a parcel on FEMA's map, decoding A, AE and X, and pairing it with the District III regional GIS map.
Where the Gregory County flood zone map lives
For a more interactive look, open the National Flood Hazard Layer viewer, where zone shading sits over a photo base, and that holds around Missouri River too. Rural land near Missouri National Recreational River with no street number is still easy to locate: zoom in from the nearest road then click the parcel area.
Pulling up a parcel
For property near Missouri National Recreational River, the no-cost parcel map for this area is the District III regional GIS map, and no login is needed to use it. Without an address in hand, pan along the nearest road and click the parcel itself, for land near Dallas included. For a tract near Herrick, copy the parcel ID from that panel; every office in the county will want it.
Legal descriptions in South Dakota
South Dakota is laid out under the Public Land Survey System, which means a tract near Burke 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 Fairfax odd-sized. Copy the legal description from the record for the parcel near Missouri National Recreational River before you request a deed or survey.
Beyond the mapped zones
Low-lying fields near Herrick may not have detailed mapping, so ask neighbors about past flooding. Marshy spots near Randall Creek Recreation Area can limit building too; the National Wetlands Inventory mapper shows mapped wetlands.
Reading A, AE and X
Out toward St. Charles, A and V zones mark the Special Flood Hazard Area, which FEMA defines as a 1% annual chance of flooding. For property near Missouri National Recreational River, a shaded X area is moderate risk, roughly the 100- to 500-year range; unshaded X is minimal risk.
Use the county map alongside FEMA
FEMA doesn't draw property lines, so pair it with the District III regional GIS map to see exactly which lot near Dallas you're looking at.
Before you lean on the lines
Around Herrick, the acreage figure is an assessed number; just a licensed surveyor sets the real lines on the ground. For a tract near Missouri River, owner names and values update on a schedule, so a deed recorded last month can take weeks to appear.
Which office to call
Recorded documents for a parcel near St. Charles are with the Register of Deeds, usually searchable by name or document number. Questions about what you can build around Fairfax need the planning or permitting office, town or county, depending on location.
Places you'll see on the map
Burke serves as the county seat, where most land records are kept. Smaller places on the map include Bonesteel, Dallas, Fairfax, and Herrick. Roughly 4,018 people live in Gregory County (Census Bureau estimate, 2023) spread over about 1,015 square miles. Places such as Missouri River, Missouri National Recreational River, and Randall Creek Recreation Area are easy to spot when you zoom out.
Neighboring parcel maps
Gregory County meets Boyd County, NE, Keya Paha County, NE, Charles Mix County, Lyman County, and Tripp County; every one of them runs a separate parcel map. A tract near the line by St. Charles can show up in two county records, so open the neighboring map too. Near Burke, our state page lists every neighboring county map across South Dakota.
On site with the map
The parcel map usually runs in a mobile browser, handy when you're parked on a road near Missouri National Recreational River, though signal can drop in rural spots. A printout of the tract near St. Charles keeps working without signal.
Money questions tied to the zone
On ground around Herrick, get the Elevation Certificate if one exists: it can change the insurance price a lot. Building or adding on near Missouri National Recreational River in a mapped zone can trigger elevation rules; check with the county or town building office before you plan.
What to request from a seller
For acreage around Missouri River, request about past flood claims before closing; an insurance quote early avoids surprises.
Gregory County: common questions
What if the flood map is wrong for my lot near Missouri National Recreational River?
On ground around Randall Creek Recreation Area, a Letter of Map Amendment (LOMA) from FEMA can remove a structure on naturally high ground, and lenders accept the result.
How often are flood maps updated near Dallas?
Usually, zones near Randall Creek Recreation Area can shift when FEMA updates a panel; your community is notified before changes take effect.
What is the difference between Zone A and AE around Missouri National Recreational River?
Near Missouri National Recreational River, both are high-risk zones, but only AE has a base flood elevation; unnumbered A zones don't list one.
Is flood insurance mandatory near Missouri National Recreational River?
For most people, for a building near Randall Creek Recreation Area 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.
Does the parcel map work on a phone for land near Randall Creek Recreation Area?
For a parcel near Fairfax, most viewers run in a mobile browser, though rural signal can drop.
Open the official Gregory 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.