On its age, its old homes and the National Register, Millbourne is more historic than 61% of U.S. towns. Its share of homes from before 1940 holds the grade up; its National Register listings pull it down.
B
HistoryA character grade: shown, never part of Millbourne’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 Millbourne’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.
NoteThe founding year comes from Wikipedia alone; no second source gives 1682.
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 (±11.2 points).
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 Millbourne’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Before the arrival of European settlers, the Lenape people were already in the Delaware Valley. After William Penn's signing of the Treaty of Shackamaxon, Samuel Sellers, the pioneering settler of the Sellers family, came from Derbyshire, England in 1682, with his brother George Sellers. Both brothers purchased two tracts of land totaling 75 acres (30 ha) and 100 acres (40 ha) from William Penn. The official survey for the land was not completed until 1690. Over time, Samuel, his sons, and grandsons expanded their land holdings through additional purchases in the surrounding area. George Sellers later died due to an unexplained death involving a tomahawk.
Nothing in the archives for these yearsWeddings on Main Street, storms, parades, school pictures, the old store. If it’s in your family album, it belongs here.
In 1682, according to Wikipedia’s history of the town. the census of 1910 counted 322 people here.
How does Millbourne rank for history?
Millbourne is more historic than 61% 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 Millbourne?
33% of Millbourne’s homes were built before 1940 (Census estimate, ±11.2 points), against a typical 18% for a Pennsylvania town; the median home was built in 1944.
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 (13), the Library of Congress (1), Wikipedia, U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia) 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.
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