West Sayville’s post office opened in 1891, and 17% of its homes were built before 1940
4 places in town are on the National Register.
How West Sayville began
When was West Sayville founded?
The West Sayville post office opened in 1891, the earliest record of the town by name.
4 historic places in West Sayville
The country’s official list of buildings and places worth saving. 3 are National Historic Landmarks, the highest tier.
National Park Service, National Register of Historic Places. Photos from Wikimedia Commons, credited on each place’s page.
History across the town line
Each neighbor’s History grade, on the same three inputs.
Questions about West Sayville’s history
What year was West Sayville founded?
The West Sayville post office opened in 1891, the earliest record of the town by name (U.S. post office records).
Memory lane
What the archives can’t tell you, neighbors can.
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 →