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404 County Route 518, Blawenburg, NJPhoto: Zeete · CC BY-SA 4.0
–Not graded
History · Blawenburg

Blawenburg’s post office opened in 1832, and 2 of its places are on the National Register

Most of Blawenburg was built recently: 0.0% of its homes predate 1940 and the median home dates from 1997.

1832first post office
2on the National Register
0.0%homes built before 1940
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Photo: Zeete · CC BY-SA 4.0
Quick answers

How Blawenburg began

When was Blawenburg founded?

1832

The Blawenburg post office opened in 1832, the earliest record of the town by name.

2020 census: 287194 years
Founding year: the first Blawenburg post office (Blevins & Helbock, CC0).
On the National Register

2 listings protect 48 historic buildings

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

places listed
2
National Historic Landmarks
0
none yet
historic buildings protected
48
each building in a district counts

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

Questions about Blawenburg’s history

What year was Blawenburg founded?

The Blawenburg post office opened in 1832, 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 →
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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 →