The Harmony Township post office opened in 1813, the earliest record of the town by name. Wikidata gives 1839. Four smaller post offices, Harmony (1813), Rocksburg (1846) and Brainards (1857), opened inside today’s town and later closed.
First census: 1,602 in 18402020 census: 2,503213 years
How historic is Harmony Township?
A
More historic than 89% of U.S. towns, on its age, its old homes and the National Register.
Founding year: the first Harmony Township post office (Blevins & Helbock, CC0). Wikidata: 1839.
History grade
What drives Harmony Township’s History grade
On its age, its old homes and the National Register, Harmony Township is more historic than 89% of U.S. towns, #68 of 468 in New Jersey. All 3 inputs are above most U.S. towns; its share of homes from before 1940 ranks highest and its age lowest.
A
HistoryA character grade: shown, never part of Harmony Township’s overall grade.
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 Harmony Township’s 31.8 sits above most of its state (78% of New Jersey towns have fewer) while its 8 historic buildings outnumber those of 74% 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 (±7.3 points). The founding year is the first post office, not a stated founding date; Wikidata’s 1839 falls in the same era, so the grade doesn’t depend on which one is used.
Founding year: the first post office (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 Harmony Township’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
Lost a third of its people between 1840 and 1900, then more than doubled.
19 censuses, 1840–2020.
U.S. Census Bureau decennial counts, from the census table on Harmony Township’s Wikipedia page.
The story so far
Harmony Township, in brief
Wikipedia doesn’t have a history of Harmony Township yet. The photos, dates and memories neighbors add here are how it gets written.
Harmony Township is a township located in Warren County in the U.S. state of New Jersey. As of the 2020 United States census, the township's population was 2,503, a decrease of 164 (−6.1%) from the 2010 census count of 2,667, which in turn reflected a decline of 62 (−2.3%) from the 2,729 counted in the 2000 census. Harmony was incorporated as a township by an act of the New Jersey Legislature on April 8, 1839, from portions of Greenwich Township and Oxford Township, based on the results of a referendum held that day. Phillipsburg Township was created March 7, 1851, from portions of the township. The township was named for Harmon Shipman, an early settler.
Its first post office opened in 1813. Between the 2010 and 2020 censuses its population fell from 2,667 to 2,503 (-6%).
Intro from Wikipedia. Population: U.S. Census Bureau.
Timeline
Harmony Township, 1813 to 2000
Woven from the archive, old maps, post office records, the National Register and the people born here.
Every edition of the U.S. Geological Survey’s map of Harmony Township. Tap a year, or press play to watch the town change.
1943Bethlehem 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 Harmony Township.
On the National Register
2 historic places in Harmony Township
The country’s official list of buildings and places worth saving.
The Harmony Township post office opened in 1813, the earliest record of the town by name (U.S. post office records). Wikidata gives 1839.
How does Harmony Township rank for history?
Harmony Township is more historic than 89% of U.S. towns, #68 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 Harmony Township?
2 listings: 1 building, among them the Van Nest-Hoff-Vannatta Farmstead (listed 2005, the first). 8 historic buildings in all.
How old are the homes in Harmony Township?
25% of Harmony Township’s homes were built before 1940 (Census estimate, ±7.3 points), against a typical 15% for a New Jersey town; the median home was built in 1966.
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 (10), Wikidata (1), the National Register of Historic Places (1), Wikidata and Wikipedia for famous people, 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.
Date?
2026
2026
2025
2017
2013
2013
2006
2006
2005
