Founding year: Wikidata. First post office: 1807.The full story ↓
History grade
What drives Nassau’s History grade
On its age, its old homes and the National Register, Nassau is more historic than 97% 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 Nassau’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 Nassau’s 482 sits above most of its state (91% of New York towns have fewer) while its 51 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 (±8.6 points). Two sources give 1806.
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 Nassau’s past
Read from the archive, the National Register and the record. The page puts what stands out first.
The town was originally formed as the "Town of Philipstown" in 1806 from parts of the Towns of Petersburgh, Schodack, and Stephentown. The town changed its name to "Nassau" in 1808, in honor of Fort Nassau, the first settlement by the Dutch in what is now New York.
The Henry Tunis Smith Farm was listed on the National Register of Historic Places in 1975.
In 1806, according to Wikidata. Nassau’s post office opened in 1807, and the census of 1820 counted 2,873 people here.
How does Nassau rank for history?
Nassau is more historic than 97% 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.
How old are the homes in Nassau?
52% of Nassau’s homes were built before 1940 (Census estimate, ±8.6 points), against a typical 27% for a New York town; the median home was built in 1938.
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 Wikidata (1), Wikipedia, Wikidata and Wikipedia for famous people, U.S. Geological Survey historical maps and U.S. Census counts (via Wikipedia). Archive images are copied here with their credits and licenses, shown on each photo’s page. Refreshed monthly.