On its age, its old homes and the National Register, Middlesex Township is more historic than 32% of U.S. towns, #923 of 1,035 in Pennsylvania. Its share of homes from before 1940 holds the grade up; its National Register listings pull it down.
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HistoryA character grade: shown, never part of Middlesex 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 Middlesex 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 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 (±8.0 points).
Founding year: our sources. 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 Middlesex Township’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Lost post offices, old corners, places now gone and burying grounds
Two other post offices opened and closed inside today’s town.
Glade Mills
1834–1907
Valencia
1879–today
McFann
1893–1902
18301930today
Hamlets and corners on the map
CooperstownGlade MillsMcFannStrables Corners
Gone or out of use
Glade Mill Airportairport
3cemeteries and burying grounds inside Middlesex Township
Glade RunMiddlesexMiddlesex Presbyterian Church
US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).
On the map
Middlesex Township on the map, 1908 to 1969
Every edition of the U.S. Geological Survey’s map of Middlesex Township. Tap a year, or press play to watch the town change.
1908New Kensington 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 Middlesex Township.
The story so far
Middlesex Township, in brief
Wikipedia doesn’t have a history of Middlesex Township yet. The photos, dates and memories neighbors add here are how it gets written.
Middlesex Township is a township in Butler County, Pennsylvania, United States. The population was 6,826 at the 2020 census.
Between the 2010 and 2020 censuses its population grew from 5,390 to 6,820 (+27%).
Intro from Wikipedia. Population: U.S. Census Bureau.
From the old history books
What they wrote about Middlesex Township in 1883
Passages that mention Middlesex Township, cut from the printed page as they were published.
History of Butler County, Pennsylvania. With illustrations and biographical sketches of some of its prominent men and pioneers1883Read the page →
Read the text
The first settlers within the present township of Peun located in the southern portion of it— within the former limits of Middlesex Township. Probably the first log cabin was made near the southwest corner of the township. We have the statement from good authority that Clark Eathbun had begunacleariatr and erected a cabin here about the year 1W>.
Text read by machine from the scan; it may contain errors.
Scans and text from the Internet Archive. Books published in 1930 or earlier, which are in the public domain.
Timeline
Middlesex Township, 1834 to 1908
Woven from the archive, old maps, post office records, the National Register and the people born here.
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.
Middlesex Township is more historic than 32% of U.S. towns, #923 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 Middlesex Township?
13% of Middlesex Township’s homes were built before 1940 (Census estimate, ±8.0 points), against a typical 18% for a Pennsylvania town; the median home was built in 1972.
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), Wikidata and Wikipedia for famous people, U.S. Geological Survey historical maps, the US Post Offices dataset (Blevins & Helbock), the USGS Geographic Names Information System and old county and town histories (Internet Archive). Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.