Each edition grades its towns against each other only.
More historic than 73% of U.S. towns. What drives it
Below: maps from 1908 on and the census since 1970.
East Deer Township dates its founding to 1836 (Wikidata). The census first counted it in 1970.
More historic than 73% of U.S. towns, on its age, its old homes and the National Register.
On its age, its old homes and the National Register, East Deer Township is more historic than 73% of U.S. towns. Its share of homes from before 1940 holds the grade up; its National Register listings pull it down.
Pennsylvania towns list about as much on the Register as the country (a typical Pennsylvania town has 2.1 per 10,000 residents, the U.S. 2.4), so East Deer Township’s 0.0 sits below most of its state (25% of Pennsylvania towns have fewer) while its 0 listings outnumber those of 23% of U.S. towns.
Founding year: Wikidata (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 →
Read from the archive, the National Register and the record. The page puts what stands out first.
The first neighbors to add old photos shape how East Deer Township’s history is told.
Two other post offices opened and closed inside today’s town.
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
Every edition of the U.S. Geological Survey’s map of East Deer Township. Tap a year, or press play to watch the town change.
U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of East Deer Township.
Wikipedia doesn’t have a history of East Deer Township yet. The photos, dates and memories neighbors add here are how it gets written.
East Deer Township is a township in Allegheny County, Pennsylvania, United States. The population was 1,490 at the 2020 census.
East Deer Township was established in 1836. Its population held steady between the last two censuses: 1,500 in 2010, 1,490 in 2020.
Intro from Wikipedia. Population: U.S. Census Bureau.
Woven from the archive, old maps, post office records, the National Register and the people born here.
On the mapFirst mapped by the U.S. Geological SurveyWeddings on Main Street, storms, parades, school pictures, the old store. If it’s in your family album, it belongs here.
Between 1,362 and 2,081 people in every census since 1970.
6 censuses, 1970–2020.
U.S. Census Bureau decennial counts, from the census table on East Deer Township’s Wikipedia page.
Each neighbor’s History grade, on the same three inputs.
In 1836, according to Wikidata. East Deer Township’s post office opened in 1877, and the census of 1970 counted 2,081 people here.
East Deer Township is more historic than 73% of U.S. towns. 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.
36% of East Deer Township’s homes were built before 1940 (Census estimate, ±5.6 points), against a typical 18% for a Pennsylvania town; the median home was built in 1954.
What the archives can’t tell you, neighbors can.
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 Wikidata and Wikipedia for famous people, 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.
