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History · Allegheny Township

Allegheny Township dates to 1790, and 19% of its homes were built before 1940

Its Register listing is the New Baltimore Bridge. Below: 8 old photos and papers, maps from 1923 on, and the census since 2000.

1790founded
1on the National Register
19%homes built before 1940
8old photos & papers
Add an old photoShare a memory
From Allegheny Township’s archive · credits on each photo
Quick answers

How Allegheny Township began

When was Allegheny Township founded?

1790

Allegheny Township dates its founding to 1790 (Wikidata). The census first counted it in 2000.

First census: 654 in 20002020 census: 613236 years
Founding year: Wikidata. First post office: 1865.The full story ↓

What stands out about Allegheny Township’s past

Read from the archive, the National Register and the record. The page puts what stands out first.

Lost villages4 post offices opened and closed inside today’s Allegheny Township, and 1 old place names are still on the map.Deep rootsEstablished in 1790: 236 years of Allegheny Township.On the map since 19234 editions of the USGS map, 1923 to 1973. Watch Allegheny Township change.
★ What stands out · Places that used to be

Lost post offices, old corners and places now gone

Four other post offices opened and closed inside today’s town.

Dividing Ridge
1865–1907
Mount Healthy
1870–1884
Glen Savage
1888–1907
Bills
1898–1907
18601940today
Hamlets and corners on the map
Glen Savage
Gone or out of use
Herman SchoolschoolMount Healthy Post Officepost officeSuhrie SchoolschoolWills Schoolschool

US Post Offices dataset (Blevins & Helbock, CC0). Places and cemeteries from the USGS Geographic Names Information System (2021).

Timeline

Allegheny Township, 1790 to 1970

Woven from the archive, old maps, post office records, the National Register and the people born here.

  1. 18th century
  2. 1790
    FoundingAllegheny Township is established
  3. 19th century
  4. 1860In the archiveMap of Allegheny Township, Somerset County, Pennsylvania, from 1860 Somerset County Map b…
  5. 1865Post officeThe Dividing Ridge post office opens
  6. 1870Post officeThe Mount Healthy post office opens
  7. 1884Post officeThe Mount Healthy post office closes
  8. 1888Post officeThe Glen Savage post office opens
  9. 1895In the archiveUniversity Park where 300 residence sites invite the home builder - the investor The wond…
  10. 20th century
  11. 1900In the archiveAllegheny Post Office
  12. 1907Post officeThe Dividing Ridge post office closes
  13. 1907Post officeThe Glen Savage post office closes
  14. 1923On the mapFirst mapped by the U.S. Geological Survey
  15. 1970In the archiveNEW BALTIMORE COVERED BRIDGE
On the map

Allegheny Township on the map, 1923 to 1973

Every edition of the U.S. Geological Survey’s map of Allegheny Township. Tap a year, or press play to watch the town change.

Allegheny Township on the 1923 USGS mapAllegheny Township on the 1944 USGS mapAllegheny Township on the 1967 USGS mapAllegheny Township on the 1973 USGS map1923Berlin 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 Allegheny Township.

The story

How Allegheny Township came to be

From Wikipedia’s history of Allegheny Township.

Read it all →

The remains of Fort Dewart (Duart) are in the northern part of the township, about half a mile north of U.S. Route 30, near the head of Breastwork Run. This small redoubt along Forbes Road was known as "the fort on the top of Allegheny Hill" during the French & Indian War.

Text from Wikipedia, licensed CC BY-SA 4.0.

By decade

Allegheny Township, decade by decade

4 decades in the archive, from the 1860s to the 1970s. Scroll each row; tap a photo for its story.

1860s–1900s7 items
Map of Allegheny Township, Somerset County, Pennsylvania, from 1860 Somerset County Map by Edward L Walker1860Map of Allegheny Township, Somerset County, Pennsylva…MapUniversity Park where 300 residence sites invite the home builder - the investor The wonderful sale is now on! An event1895University Park where 300 residence sites invite the …Allegheny Post Office1900Allegheny Post OfficeAllegheny Observatory1905Allegheny ObservatoryHigh School1905High SchoolCarnegie Library1905Carnegie LibraryWashington Monument1905Washington Monument
1910s–1960snothing yet
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.
Add from your album
1970s1 item
NEW BALTIMORE COVERED BRIDGE1970NEW BALTIMORE COVERED BRIDGE
1980s–1990snothing yet
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.
Add from your album
Today8 recent
US 30 eb at Bedford Co., PA line, May 20242024US 30 eb at Bedford Co., PA line, May 2024US 30 eb at Bald Knob Summit, PA, May 20242024US 30 eb at Bald Knob Summit, PA, May 2024PA 31 wb in Allegheny Twp., Somerset Co., Aug. 20242024PA 31 wb in Allegheny Twp., Somerset Co., Aug. 2024New Baltimore Road wb entering New Baltimore, PA, Aug. 20242024New Baltimore Road wb entering New Baltimore, PA, Aug…Mt. Zion Lutheran Church and Cemetery, Allegheny Twp., Somerset Co., PA, Aug. 20242024Mt. Zion Lutheran Church and Cemetery, Allegheny Twp.…Allegheny Twp., Somerset Co., PA municipal building, Aug. 20242024Allegheny Twp., Somerset Co., PA municipal building, …New Baltimore Bridge2015New Baltimore BridgeMap of Somerset County, Pennsylvania highlighting Allegheny Township2008Map of Somerset County, Pennsylvania highlighting All…Map
Then & now

Stand where they stood

No then-and-now pairs yet. Take a photo from the same spot as an old one and they appear here side by side.

University Park where 300 residence sites invite the home builder - the investor The wonderful sale is now on! An event
Retake this viewUniversity Park where 300 residence sites invite the home builder - the investor The wonderful sale is now on! An event, 1895

Find the spot, match the angle, and add your photo. It becomes the first then-and-now pair on Allegheny Township’s page.

Retake this view · +15
On the National Register

1 historic place in Allegheny Township

The country’s official list of buildings and places worth saving.

place listed
1
National Historic Landmarks
0
none yet
historic buildings protected
1
each building in a district counts
first listed
1980
New Baltimore Bridge
New Baltimore Bridge
Structures

Architectural styles listings

Queenpost Truss1
New Baltimore BridgeQueenpost Truss

National Park Service, National Register of Historic Places. Photos from Wikimedia Commons, credited on each place’s page.

People over time

Allegheny Township, census by census

010020030040050060070020002020Peak: 692

Between 615 and 692 people in every census since 2000.

3 censuses, 2000–2020.

U.S. Census Bureau decennial counts, from the census table on Allegheny Township’s Wikipedia page.

Famous people

Famous people close to Allegheny Township

Nobody well known was born in Allegheny Township itself, so here are the best known from just nearby.

See all →
Augustine B. KelleyAmerican politician · b. 1883
John Charles ThomasAmerican opera singer · b. 1890
Rush ClarkAmerican politician · b. 1834
B
Bill CollinsProfessional golfer · b. 1928
F
Frank NicholsonAmerican baseball player · b. 1889
J
John PatrickAmerican football player · b. 1919
Help out

Finish Allegheny Township’s story

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

Decades since 1900 with photos
00s10s20s30s40s50s60s70s80s90s
2 of 10 decades. The empty ones are waiting for someone’s album.
Retake an old viewUniversity Park where 300 residence sit…: stand where they stood+15Share a family photoSign in to add one+10
Stories next door

History across the town line

Each neighbor’s History grade, on the same three inputs.

Stonycreek Township3 historic placesABrothersvalley Township1 historic placeAShade Township1 historic placeA+Juniata TownshipIts storynot graded: under 1,000 residents or part of its townFairhope Township1 historic placenot graded: under 1,000 residents or part of its townNorthampton TownshipIts storynot graded: under 1,000 residents or part of its town

Questions about Allegheny Township’s history

What year was Allegheny Township founded?

In 1790, according to Wikidata. Allegheny Township’s post office opened in 1865, and the census of 2000 counted 654 people here.

What is on the National Register in Allegheny Township?

One place: the New Baltimore Bridge (listed 1980).

Memory lane

What the archives can’t tell you, neighbors can.

Town Square →
Start a conversation
Sources

Where this page comes from

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). How TownRatings grades history →

From Wikimedia Commons (10), the Library of Congress (6), the National Register of Historic Places (1), Wikipedia, 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.