The Warren post office opened in 1810, the earliest record of the town by name. Two smaller post offices, Crain's Corners (1828) and Cullen (1866), opened inside today’s town and later closed.
2020 census: 1,029216 years
How historic is Warren?
A+
More historic than 96% of U.S. towns, on its age, its old homes and the National Register.
Founding year: the first Warren post office (Blevins & Helbock, CC0).The full story ↓
History grade
What drives Warren’s History grade
On its age, its old homes and the National Register, Warren is more historic than 96% of U.S. towns. 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 Warren’s overall grade.
New York towns list more on the Register than most of the country (a typical New York town has 12.3 per 10,000 residents, the U.S. 2.4), so Warren’s 371 sits above most of its state (89% of New York towns have fewer) while its 48 historic buildings outnumber those of 85% 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 (±12.0 points). The founding year is the first post office, not a stated founding date.
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 Warren’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
The area was first settled prior to 1776. The town of Warren was created in 1796 from the town of German Flatts. In 1812, part of Warren was used to form the newer town of Columbia. The population of Warren in 1865 was 1,611. Sunset Hill was added to the National Register of Historic Places in 2007.
Passages that mention Warren, cut from the printed page as they were published.
Genealogical gleanings of Siggins, and other Pennsylvania families1918 · page 313Read the page →
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Other Families July, 1804 — Who served with distinction in the war of the Revolution, who surveyed and laid out the town of Warren in the year 1795 and whose descendants presented Crescent Park to the tovv'n of Warren."
Text read by machine from the scan; it may contain errors.
Genealogical gleanings of Siggins, and other Pennsylvania families1918 · page 24Read the page →
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This was the first grist mill in Warren county, there being at that time no mill within a radius of thirty miles. To the mill at Union and that belonging to the Holland Land Company at Titusville, many grists were borne from this county on the backs of their owners or of the patient oxen guided through the trackless forests only by Indian Trails.
Text read by machine from the scan; it may contain errors.
Warren County history and directory1886 · page 81Read the page →
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We have thus glanced briefl.y at the first settlements in the principal parts of Sussex and Warren. They Avere made for the most part within a period of about fifty years, embracing the first half of the eighteenth century,— that is by the year 1750 permanent settlements had been made in most of the important parts of the two counties. When Morris county was set off in 1738, northern New Jersey be-
Text read by machine from the scan; it may contain errors.
Scans and text from the Internet Archive. Books published in 1930 or earlier, which are in the public domain.
Timeline
Warren, 1810 to 1958
Woven from the archive, old maps, post office records, the National Register and the people born here.
The Warren post office opened in 1810, the earliest record of the town by name (U.S. post office records).
How does Warren rank for history?
Warren is more historic than 96% of U.S. towns. 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 Warren?
5 listings: 4 buildings, among them the Jordanville Public Library (listed 1984, the first), and 1 historic district, the Holy Trinity Monastery, with 41 contributing buildings. 48 historic buildings in all.
How old are the homes in Warren?
42% of Warren’s homes were built before 1940 (Census estimate, ±12.0 points), against a typical 27% for a New York town; the median home was built in 1970.
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 the National Register of Historic Places (5), Wikipedia, Wikidata and Wikipedia for famous people, the US Post Offices dataset (Blevins & Helbock), the USGS Geographic Names Information System and old county and town histories (Internet Archive). Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.