On its age, its old homes and the National Register, Monongahela Township is more historic than 84% of U.S. towns. All 2 inputs are above most U.S. towns; its National Register listings ranks highest and its share of homes from before 1940 lowest.
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HistoryA character grade: shown, never part of Monongahela 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 Monongahela Township’s 31.9 sits above most of its state (84% of Pennsylvania towns have fewer) while its 4 listings outnumber those of 68% 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 (±7.0 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 Monongahela 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 Monongahela Township. Tap a year, or press play to watch the town change.
1900Masontown 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 Monongahela Township.
Monongahela Township is the location of a prehistoric petroglyph site known as the "Sugar Grove Petroglyphs". Created by an unknown pre-Columbian indigenous people, the petroglyphs are an archaeological site, and they have been listed on the National Register of Historic Places.
The Glassworks-Gabler House, Glassworks-Core House, John Minor Crawford House, and Reppert-Gabler House are also listed on the National Register of Historic Places.
What they wrote about Monongahela Township in 1888
Passages that mention Monongahela Township, cut from the printed page as they were published.
History of Greene County, Pennsylvania,1888 · page 522Read the page →
Read the text
Monongahela Township from the earliest times has been noted for the prosperity which has marked its progress. Its home markets have been good and the facility with which from every part it could reach transportation practically brought the markets beyond the bounds of the county to its own doors. Near the center of the township on Whiteley Creek is located the pleasant little village of Mapletown, named probably from the ancestors of Robert and Thomas Maple. The intelligence and culture of the people is marked.
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
Monongahela Township, 1850 to 1967
Woven from the archive, old maps, post office records, the National Register and the people born here.
Monongahela Township is more historic than 84% 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.
What is on the National Register in Monongahela Township?
4 listings: 4 buildings, among them the Glassworks-Core House (listed 1995, the first).
How old are the homes in Monongahela Township?
19% of Monongahela Township’s homes were built before 1940 (Census estimate, ±7.0 points), against a typical 18% for a Pennsylvania town; the median home was built in 1967.
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 the Library of Congress (1), the National Register of Historic Places (4), Wikipedia, U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia), 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.
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