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History · Deerfield Township

Deerfield Township’s post office opened in 1828

Most of Deerfield Township was built recently: 5% of its homes predate 1940 and the median home dates from 1968. Below: maps from 1927 on and the census since 2000.

1828first post office
0on the National Register
5%homes built before 1940
Add an old photoShare a memory
Photo: Dougtone · CC BY-SA 2.0
Quick answers

How Deerfield Township began

When was Deerfield Township founded?

1828

The Deerfield Township post office opened in 1828, the earliest record of the town by name. Three smaller post offices, Deerfield (1828), Cobham (1864) and Altholm (1913), opened inside today’s town and later closed.

First census: 333 in 20002020 census: 269198 years
Founding year: the first Deerfield Township post office (Blevins & Helbock, CC0).

What stands out about Deerfield Township’s past

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

A history waiting to be writtenNo old photos of Deerfield Township are in the public archives yet. The rest are in attics and albums.Lost villages3 post offices opened and closed inside today’s Deerfield Township, and 3 old place names are still on the map.Deep rootsA post office since 1828: 198 years of Deerfield Township.
★ What stands out · Help out

Start Deerfield Township’s collection

The first neighbors to add old photos shape how Deerfield Township’s history is told.

Decades since 1900 with photos
00s10s20s30s40s50s60s70s80s90s
0 of 10 decades. The empty ones are waiting for someone’s album.
Share a family photoSign in to add one+10
Places that used to be

Lost post offices, old corners, places now gone and burying grounds

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

Deerfield
1828–1844
Cobham
1864–1904
Altholm
1913–1927
18201920today
Hamlets and corners on the map
AlthomCobhamMagee
Gone or out of use
McKean SchoolschoolNelson SchoolschoolThompsons Stationlocale
1cemetery inside Deerfield Township
Sutton Hill

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

Timeline

Deerfield Township, 1828 to 1927

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

  1. 19th century
  2. 1828Post officeThe Deerfield post office opens
  3. 1844Post officeThe Deerfield post office closes
  4. 1864Post officeThe Cobham post office opens
  5. 20th century
  6. 1904Post officeThe Cobham post office closes
  7. 1913Post officeThe Altholm post office opens
  8. 1927Post officeThe Altholm post office closes
  9. 1927On the mapFirst mapped by the U.S. Geological Survey
The story so far

Deerfield Township, in brief

Wikipedia doesn’t have a history of Deerfield Township yet. The photos, dates and memories neighbors add here are how it gets written.

Deerfield Township is a township in Warren County, Pennsylvania, United States. The population was 270 at the 2020 census, down from 339 at the 2010 census.

Its first post office opened in 1828. Between the 2010 and 2020 censuses its population fell from 339 to 269 (-21%).

Intro from Wikipedia. Population: U.S. Census Bureau.

By decade

Deerfield Township, decade by decade

Today1 recent
Pennsylvania State Route 272012Pennsylvania State Route 27
On the map

Deerfield Township on the map, 1927 to 1930

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

Deerfield Township on the 1927 USGS mapDeerfield Township on the 1930 USGS map1927Tidioute 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 Deerfield Township.

People over time

Deerfield Township, census by census

010020030020002020Peak: 339

Between 270 and 339 people in every census since 2000.

3 censuses, 2000–2020.

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

Famous people

Famous people close to Deerfield Township

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

See all →
S
Susan KiefferAmerican geologist · b. 1942
William E. StevensonAmerican politician · b. 1820
Guy HeckerAmerican pitcher in Major League Baseball · b. 1856
William F. Clinger, Jr.American politician · b. 1929
Sherry MageeAmerican baseball player · b. 1884
William Henry AndrewsAmerican politician from Pennsylvania · b. 1846
Stories next door

History across the town line

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

Watson TownshipIts storynot graded: under 1,000 residents or part of its townTriumph TownshipIts storynot graded: under 1,000 residents or part of its townLimestone TownshipIts storynot graded: under 1,000 residents or part of its townPittsfield TownshipIts storyBBrokenstraw Township1 historic placeA−TidiouteIts storynot graded: under 1,000 residents or part of its townEldred TownshipIts storynot graded: under 1,000 residents or part of its townPleasant TownshipIts storyC

Questions about Deerfield Township’s history

What year was Deerfield Township founded?

The Deerfield Township post office opened in 1828, the earliest record of the town by name (U.S. post office records).

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 (1), 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.