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Mount Airy Historic DistrictMount Airy Historic District · Photo: Zeete · CC BY-SA 4.0
AHistory
History · West Amwell Township

West Amwell Township dates to 1846, and 16% of its homes were built before 1940

More historic than 86% of U.S. towns · #84 of 468 in New Jersey. What drives it

1 place in town is on the National Register, among them a historic district with 26 buildings. Below: 2 old photos and papers, maps from 1907 on, and the census since 1850.

1846founded
1on the National Register
16%homes built before 1940
2old photos & papers
From West Amwell Township’s archive · credits on each photo
Quick answers

How West Amwell Township began

When was West Amwell Township founded?

1846

West Amwell Township dates its founding to 1846 (Wikidata and Wikipedia’s history agree). The census first counted it in 1850.

First census: 1,175 in 18502020 census: 3,005180 years

How historic is West Amwell Township?

A

More historic than 86% of U.S. towns, on its age, its old homes and the National Register.

What drives the grade ↓
Founding year: Wikidata; Wikipedia’s history section gives the same year. First post office: 1885.The full story ↓
History grade

What drives West Amwell Township’s History grade

On its age, its old homes and the National Register, West Amwell Township is more historic than 86% of U.S. towns, #84 of 468 in New Jersey. All 3 inputs are above most U.S. towns; its National Register listings ranks highest and its share of homes from before 1940 lowest.

A
HistoryA character grade: shown, never part of West Amwell Township’s overall grade.
All U.S. towns we grade (21,289)Ahead of 86%
NewerOlder
New Jersey towns of 2,500+ (468)Ahead of 82%

New Jersey towns list more on the Register than most of the country (a typical New Jersey town has 3.7 per 10,000 residents, the U.S. 2.4), so West Amwell Township’s 85.9 sits above most of its state (85% of New Jersey towns have fewer) while its 26 historic buildings outnumber those of 81% of U.S. towns.

How sure. Graded on any two of the three inputs instead, the letter would range from A− to A. The pre-1940 share is a Census survey estimate (±5.3 points). Two sources give 1846.

Founding year: Wikidata (other dates in Quick answers). 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 West Amwell Township’s past

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

★ What stands out · Help out

Start West Amwell Township’s collection

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

Decades since 1900 with photos
00s10s20s30s40s50s60s70s80s90s
0 of 10 decades. The empty ones are waiting for someone’s album.
People over time

West Amwell Township, census by census

05001,0001,5002,0002,5003,0003,5004,00018501900195020001,175 in 1850Low: 735

Lost a third of its people between 1850 and 1920, then grew 4-fold.

18 censuses, 1850–2020.

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

Places that used to be

Lost post offices, old corners and places now gone

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

Mount Airy
1885–1907
Rocktown
1897–1907
18801950today
Hamlets and corners on the map
AlexaukenMount AiryRocktown
Gone or out of use
Rocktown Schoolschool

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

The story

How West Amwell Township came to be

From Wikipedia’s history of West Amwell Township.

Read it all →

The earliest settlers of the area were the Delaware Native Americans, who had a path through the woods from Lambertville through Mount Airy, Ringoes and Reaville to Newark which would later become the route followed by the Old York Road.

In 1935, local farmers signed a declaration against the Potato Control Law, which established federal controls on the growth of the crop, stating "[t]hat we protest against and declare that we will not be bound by the 'Potato Control Law,' an unconstitutional measure recently enacted by the United States Congress. We shall produce on our own land such potatoes as we may wish to produce and will dispose of them in such manner as we may deem proper."

Text from Wikipedia, licensed CC BY-SA 4.0.

Timeline

West Amwell Township, 1846 to 2010

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

  1. 19th century
  2. 1846
    FoundingWest Amwell Township is established
  3. 1873In the archiveWest Amwell (Township); West Amwell Business Notices.; East Amwell Business Notices
  4. 1885Post officeThe Mount Airy post office opens
  5. 1897Post officeThe Rocktown post office opens
  6. 20th century
  7. 1907Post officeThe Mount Airy post office closes
  8. 1907Post officeThe Rocktown post office closes
  9. 1907On the mapFirst mapped by the U.S. Geological Survey
  10. 21st century
  11. 2010CensusPopulation peaks at 3,840
By decade

West Amwell Township, decade by decade

One decade in the archive so far: the 1870s. Scroll each row; tap a photo for its story.

On the map

West Amwell Township on the map, 1907 to 1982

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

West Amwell Township on the 1907 USGS mapWest Amwell Township on the 1982 USGS map1907Trenton sheet · 1:125,000

U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of West Amwell Township.

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.

West Amwell (Township); West Amwell Business Notices.; East Amwell Business Notices
Retake this viewWest Amwell (Township); West Amwell Business Notices.; East Amwell Business Notices, 1873

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

Retake this view · +15
On the National Register

1 listing protects 26 historic buildings

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

place listed
1
National Historic Landmarks
0
none yet
historic buildings protected
26
each building in a district counts
first listed
1989
Mount Airy Historic District

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

Famous people

Famous people close to West Amwell Township

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

See all →
Stories next door

History across the town line

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

Questions about West Amwell Township’s history

What year was West Amwell Township founded?

In 1846, according to Wikidata and Wikipedia’s history of the town. West Amwell Township’s post office opened in 1885, and the census of 1850 counted 1,175 people here.

How does West Amwell Township rank for history?

West Amwell Township is more historic than 86% of U.S. towns, #84 of 468 in New Jersey. 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 West Amwell Township?

One place: the Mount Airy Historic District (listed 1989).

How old are the homes in West Amwell Township?

16% of West Amwell Township’s homes were built before 1940 (Census estimate, ±5.3 points), against a typical 15% for a New Jersey town; the median home was built in 1975.

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).

From Wikimedia Commons (11), Wikidata (1), 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.