History · Monongahela

A history of Monongahela,
since 1770

Postcards, papers and photographs of Monongahela from public archives, woven together by decade. Neighbors fill in the gaps.

1770established
7old images & papers
4historic places
4recent photos
From Monongahela’s archive · credits on each photo

The story

from WikipediaRead it all ↗

Monongahela was founded in 1769 on a tract of land near the confluence of Pigeon Creek and the Monongahela River. It is the oldest settlement in the Monongahela River Valley and most likely the oldest in Washington County. The word Monongahela is Native American in origin, meaning "falling banks". The Monongahela tribe was also indigenous to the area prior to the settlement of the city.

Text from Wikipedia, licensed CC BY-SA 4.0.

Timeline

built from the dates on the items below
1770Established
1815American Telegraph 7-5-1815Document
1880s2 items · 1940 Census Enumeration District Maps…Commons
1900s2 items · Monongahela City, Pennsylvania, 1902Commons
1933VIEW WEST SHOWING EAST (FRONT) ELEVATION AND LO…Commons
1940–1989Nothing in the archives yet
1994View of historic Second Street brick launch ram…Commons
Help out

Finish Monongahela’s story

Most archives stop around 1920. The photos from after that are in family albums, not libraries.

3 of 10 decades since 1900 have photos 🔁Retake an old view1940 Census Enumeration District …, 1880: stand where they stood+15 📦Share a family photoSign in to add one+10

Famous people from Monongahela

See all 24 →
By decade

Monongahela, decade by decade

National Register of Historic Places

4 historic places in Monongahela

4 places in Monongahela are on the National Register of Historic Places, the country’s official list of buildings and places worth saving. One is a National Historic Landmark, the highest tier, which fewer than 3% of listings reach.

#131
In Pennsylvaniaby listings · most towns there have none
4places listed3 buildings · 1 other
1National Historic LandmarkEdward G. Acheson House
3historic buildings protectedcounting each building in a district
1976first listedEdward G. Acheson House · newest: Bethel African American Episcopal Church of Monongahela City, 2002

Where they are

Tap a dot for a photo and link. Districts show at their center.
BuildingsSitesBigger dot = landmark

Architectural styles

From each listing’s National Archives record · 3 of 4 name a style
Gothic Revival2
Vernacular1

When they were listed

The Register began in 1966. Monongahela’s busiest decade was the 2000s.
National Park Service, National Register of Historic Places (05/22/2026) · styles from the National Archives catalog · photos from Wikimedia Commons, credited on each place

Then & now

No then-and-now pairs yet. Take a photo from the same spot as 1940 Census Enumeration District Maps - Pennsylvania - Washington County - Monongahela - ED 63-95, ED 63-96, ED 63-97, … (1880) and it appears here side by side.

🔁 Retake this view · +15

Stories next door

nearby towns’ history

From Wikimedia Commons (11) and the National Register (1). Images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.

The coffee’s on

Where to, neighbor?

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Boundary source: https://tigerweb.geo.census.gov/arcgis/rest/services/TIGERweb/Places_CouSub_ConCity_SubMCD/MapServer/18 · 2025-01-01