1 of Allison Township’s places is on the National Register
Its Register listing is the South Dakota Dept. of Transportation Bridge No. 07-009-060. Most of Allison Township was built recently: 0.0% of its homes predate 1940 and the median home dates from 1982. Below: maps from 1968 on.
Wikipedia doesn’t have a history of Allison Township yet. The photos, dates and memories neighbors add here are how it gets written.
Allison Township is a township in Brown County, South Dakota, United States. According to the 2010 census, there were 20 people residing in the township of Allison. The population density was 0.22 inhabitants/km².
Between the 2010 and 2020 censuses its population grew from 20 to 21 (+5%).
Intro from Wikipedia. Population: U.S. Census Bureau.
By decade
No old photos in the archives yet
Weddings on Main Street, storms, parades, school pictures, the old store. If it’s in your family album, it belongs here.
Be the first to add onePhotograph a print flat, in daylight, no flash.
Every edition of the U.S. Geological Survey’s map of Allison Township. Tap a year, or press play to watch the town change.
1968Frederick SW sheet · 1:24,000
U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Allison Township.
On the National Register
1 historic place in Allison Township
The country’s official list of buildings and places worth saving.
Founding dates: Wikidata, Wikipedia, the U.S. post office records of Blevins & Helbock (CC0) and the Census. Homes by year built: Census ACS 2020–24. National Register of Historic Places: National Park Service (list of May 22, 2026). Old photos, postcards and papers: Wikimedia Commons, the Library of Congress and other public archives, credited on each item’s page. Maps: U.S. Geological Survey historical topographic maps (via Esri) and Sanborn fire-insurance maps (Library of Congress). History text and census tables: Wikipedia (CC BY-SA 4.0). Places that used to be: USGS Geographic Names Information System (2021). How TownRatings grades history →
From the National Register of Historic Places (1) and U.S. Geological Survey historical maps. Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.