Founding year: Wikipedia. First post office: 1818.The full story ↓
History grade
What drives Troy Township’s History grade
On its age, its old homes and the National Register, Troy Township is more historic than 90% of U.S. towns, #149 of 593 in Indiana. All 3 inputs are above most U.S. towns; its National Register listings ranks highest and its share of homes from before 1940 lowest.
A
HistoryA character grade: shown, never part of Troy Township’s overall grade.
Indiana towns list more on the Register than most of the country (a typical Indiana town has 7.9 per 10,000 residents, the U.S. 2.4), so Troy Township’s 153 sits above most of its state (85% of Indiana towns have fewer) while its 184 historic buildings outnumber those of 93% of U.S. towns.
How sure. Graded on any two of the three inputs instead, the letter would range from A− to A. The pre-1940 share is a Census survey estimate (±3.0 points). Two sources give 1815.
Founding year: Wikipedia (other dates in Quick answers). 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 Troy 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 Troy Township. Tap a year, or press play to watch the town change.
1949Cannelton 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 Troy Township.
On the National Register
5 listings protect 184 historic buildings
The country’s official list of buildings and places worth saving. One is a National Historic Landmark, the highest tier.
places listed
5
National Historic Landmark
1
none yet
historic buildings protected
184
each building in a district counts
National Park Service, National Register of Historic Places. Photos from Wikimedia Commons, credited on each place’s page.
Places that used to be
Lost post offices, places now gone and burying grounds
Another post office, Rock Island, opened and closed inside today’s town.
Gone or out of use
Rock Island Post Officepost office
5cemeteries and burying grounds inside Troy Township
BolinLog ChurchPowellSaint MichaelsSaint Pius
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
Stories next door
History across the town line
Each neighbor’s History grade, on the same three inputs.
In 1815, according to Wikipedia’s history of the town. Troy Township’s post office opened in 1818, and the census of 1860 counted 363 people here.
How does Troy Township rank for history?
Troy Township is more historic than 90% of U.S. towns, #149 of 593 in Indiana. 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 Troy Township?
18% of Troy Township’s homes were built before 1940 (Census estimate, ±3.0 points), against a typical 14% for an Indiana town; the median home was built in 1969.
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 Wikimedia Commons (5), Wikipedia, U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia), 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.