Blog · October 14, 2026 · South Dakota
Buffalo County Township Map in South Dakota
Township lines, sections and parcel records for land around Fort Thompson.
Main page: Buffalo County, SD GIS & Parcel Viewer (official map link, Buffalo County facts and neighboring maps).
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A Buffalo County township map answers two different questions around Fort Thompson: which local township a property sits in, and where it falls on the survey grid. Here's how to see township lines for Buffalo County, South Dakota, on free official maps.
How to use the Buffalo County township map
Where civil townships exist in the county, they are named local units, and their duties near Gann Valley depend on South Dakota law. The survey township cited in deeds near Fort Thompson follows the federal survey grid, in which each township is about 36 square miles, split into 36 sections of about 640 acres.
Search Buffalo County parcels by owner, address or ID
Buffalo County publishes its parcels on the District III regional GIS map, which runs on the District III planning district web GIS, free to use for a lot in Gann Valley or a property near Fort Thompson. Most people find their Buffalo County tract fastest by searching an address in Fort Thompson, then clicking the outline. Our Buffalo County, SD page keeps the official link and the maps next door to Fort Thompson in one place.
Seeing township lines on the Buffalo County map
The District III regional GIS map is the quickest Buffalo County township map for most people: switch on boundaries and click a parcel near Fort Thompson. For the survey grid, look for section, township and range in the legal description on the Buffalo County record.
How the survey grid is numbered
On a grid map of Buffalo County, sections are numbered from 1 in the northeast corner, and the numbering ends at 36 in the southeast corner. Aliquot descriptions for land near Fort Thompson read backward: locate the southwest quarter, then its northeast quarter, on the county grid. Correction lines and irregular sections exist, so a section near Fort Thompson may not be exactly 640 acres.
Old names and overlapping districts in Buffalo County
Township names on a historical atlas of Buffalo County can help when a family deed near Gann Valley uses an old place name. Election maps, school districts and fire districts in Buffalo County do not always follow township lines near Gann Valley, so check each one separately.
Work and land use in Buffalo County
County Business Patterns counted 11 business establishments in Buffalo County for 2022, led by health care and social assistance and retail trade.
Towns and land across Buffalo County
Gann Valley is the seat of Buffalo County and the hub for its land records. Smaller places such as Fort Thompson appear on the county map as little clusters of lots. Roughly 471 square miles of land and about 1,884 residents (2023 estimate) make up Buffalo County. Beyond the town lots in Gann Valley, expect big rural parcels across the county.
Neighboring maps around Buffalo County
Buffalo County borders Brule County, Hand County, Hyde County, Jerauld County, and Lyman County, and each keeps its own parcel map and records. Every map bordering Buffalo County is listed on our South Dakota directory.
Buffalo County land records
For land near Gann Valley, the deed itself lives in the county recording office, and the map is an index to it. Easements and access rights near Fort Thompson live in recorded documents, so read the deed, not just the county map.
Why the township matters
For a parcel near Fort Thompson, township lines affect tax bills, local permits and voting precincts, so check the record before assuming. Buyers looking near Gann Valley sometimes find the township office is the place to ask about local road plans and ordinances.
Buffalo County, SD: common questions
What do township and range mean on a deed near Gann Valley?
They locate land near Gann Valley on the federal survey grid; each survey township holds 36 sections of about 640 acres.
Can I see township boundaries near Fort Thompson online?
Usually; turn on boundary layers in the county viewer and zoom toward Fort Thompson.
Why is my mailing address in Gann Valley but my township different?
Postal service areas around Gann Valley cross township lines, so the two commonly differ.
How big is a quarter section near Fort Thompson?
A standard section is about 640 acres, so a quarter section near Fort Thompson is about 160, although corrections make some smaller.
Open the official Buffalo County, SD parcel map Buffalo 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.