On its age, its old homes and the National Register, Grover Township is more historic than 81% of U.S. towns, #169 of 768 in Illinois. All 2 inputs are above most U.S. towns; its National Register listings ranks highest and its share of homes from before 1940 lowest.
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HistoryA character grade: shown, never part of Grover Township’s overall grade.
Few Illinois towns list much on the Register (a typical Illinois town has 0.5 per 10,000 residents, the U.S. 2.4), so Grover Township’s 8.5 sits above most of its state (82% of Illinois towns have fewer) while its 3 historic buildings outnumber those of 65% of U.S. towns.
How sure. Graded on two of the three inputs, so a change in either one moves the letter more than it would with three. The pre-1940 share is a Census survey estimate (±6.0 points).
Founding year: our sources. Homes: Census ACS 2020–24. National Register: National Park Service, May 2026 list; each listing counted once (boundary changes and added documentation belong to their listing), and a historic district counts its contributing buildings. How TownRatings grades history →
What stands out about Grover Township’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Every edition of the U.S. Geological Survey’s map of Grover Township. Tap a year, or press play to watch the town change.
1948Fairfield sheet · 1:62,500
U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Grover Township.
On the National Register
2 historic places in Grover Township
The country’s official list of buildings and places worth saving.
places listed
2
National Historic Landmarks
0
none yet
historic buildings protected
3
each building in a district counts
National Park Service, National Register of Historic Places. Photos from Wikimedia Commons, credited on each place’s page.
Famous people
Famous people close to Grover Township
Nobody well known was born in Grover Township itself, so here are the best known from just nearby.
Grover Township is more historic than 81% of U.S. towns, #169 of 768 in Illinois. The History grade combines the town’s founding era, the share of homes built before 1940 and its National Register listings. It’s a character grade, so it isn’t part of the overall grade. How it works.
How old are the homes in Grover Township?
18% of Grover Township’s homes were built before 1940 (Census estimate, ±6.0 points), against a typical 11% for an Illinois town; the median home was built in 1956.
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).
From U.S. Geological Survey historical maps, the US Post Offices dataset (Blevins & Helbock) 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.