Wikipedia doesn’t have a history of Grenville Township yet. The photos, dates and memories neighbors add here are how it gets written.
Grenville is a town in Day County, South Dakota, United States. The population was 48 at the 2020 census. Grenville was laid out in 1914, and named for the greenery of the original town site.
Grenville Township was established in 1914. Between the 2010 and 2020 censuses its population fell from 84 to 65 (-23%).
Intro from Wikipedia. Population: U.S. Census Bureau.
Every edition of the U.S. Geological Survey’s map of Grenville Township. Tap a year, or press play to watch the town change.
1970Roslyn 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 Grenville Township.
People over time
Grenville Township, census by census
Between 48 and 260 people in every census since 1930.
10 censuses, 1930–2020.
U.S. Census Bureau decennial counts, from the census table on Grenville Township’s Wikipedia page.
Famous people
Famous people close to Grenville Township
Nobody well known was born in Grenville Township itself, so here are the best known from just nearby.
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 Wikimedia Commons (1), U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia) and the USGS Geographic Names Information System. Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.