Founding year: Wikipedia. First post office: 1830.The full story ↓
History grade
What drives Port Carbon’s History grade
On its age, its old homes and the National Register, Port Carbon is more historic than 78% of U.S. towns. Its share of homes from before 1940 holds the grade up; its National Register listings pull it down.
A−
HistoryA character grade: shown, never part of Port Carbon’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 Port Carbon’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 (±8.8 points). Two sources give 1806.
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 Port Carbon’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Port Carbon was founded by Abraham Pott, a son of John Pott who founded Pottsville in 1806.
Port Carbon was the site of the first lock on the Schuylkill Canal, on its route for transport of coal mined in the region to Philadelphia. Robert Allison, a local industrialist, purchased the first commercially manufactured automobile, a Winton.
In 1806, according to Wikipedia’s history of the town. Port Carbon’s post office opened in 1830, and the census of 1830 counted 900 people here.
How does Port Carbon rank for history?
Port Carbon is more historic than 78% 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.
How old are the homes in Port Carbon?
67% of Port Carbon’s homes were built before 1940 (Census estimate, ±8.8 points), against a typical 18% for a Pennsylvania town; the median home was built in 1938.
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 (12), Wikipedia, 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.