The Bart Township post office opened in 1823, the earliest record of the town by name. Four smaller post offices, Octorara (1807), Mount Pleasant (1815) and Bartville (1853), opened inside today’s town and later closed.
2020 census: 3,181203 years
How historic is Bart Township?
B
More historic than 64% of U.S. towns, on its age, its old homes and the National Register.
Founding year: the first Bart Township post office (Blevins & Helbock, CC0).
History grade
What drives Bart Township’s History grade
On its age, its old homes and the National Register, Bart Township is more historic than 64% of U.S. towns, #560 of 1,035 in Pennsylvania. Its age holds the grade up; its National Register listings pull it down.
B
HistoryA character grade: shown, never part of Bart Township’s overall grade.
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 Bart 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.
How sure. Graded on any two of the three inputs instead, the letter would range from B− to A−. The pre-1940 share is a Census survey estimate (±9.2 points). The founding year is the first post office, not a stated founding date.
Founding year: the first post office (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 Bart 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 Bart Township. Tap a year, or press play to watch the town change.
1912Quarryville 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 Bart Township.
The story so far
Bart Township, in brief
Wikipedia doesn’t have a history of Bart Township yet. The photos, dates and memories neighbors add here are how it gets written.
Georgetown is an unincorporated community and census-designated place (CDP) in Bart Township, Pennsylvania, United States. As of the 2010 census, the population was 1,022. Georgetown has a post office for P.O. boxes that is called Bart and has the ZIP code of 17503. Otherwise, the CDP is divided into three ZIP code areas for more distant communities. Half of the small community of Nickel Mines, the site of the West Nickel Mines School shooting, is within the Georgetown CDP. The alleged shooter, Charles Carl Roberts IV, was a resident of Georgetown, where he lived with his wife and children.
Its first post office opened in 1823. Between the 2010 and 2020 censuses its population grew from 3,094 to 3,181 (+3%).
Intro from Wikipedia. Population: U.S. Census Bureau.
Timeline
Bart Township, 1807 to 1912
Woven from the archive, old maps, post office records, the National Register and the people born here.
The Bart Township post office opened in 1823, the earliest record of the town by name (U.S. post office records).
How does Bart Township rank for history?
Bart Township is more historic than 64% of U.S. towns, #560 of 1,035 in Pennsylvania. 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 Bart Township?
22% of Bart Township’s homes were built before 1940 (Census estimate, ±9.2 points), against a typical 18% for a Pennsylvania town; the median home was built in 1973.
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.
