Each edition grades its towns against each other only.
More historic than 88% of U.S. towns · #302 of 758 in New York. What drives it
6 places in town are on the National Register. Below: 6 old photos and papers, maps from 1887 on, and the census since 1790.
The Mamaroneck post office opened in 1812, the earliest record of the town by name.
More historic than 88% of U.S. towns, on its age, its old homes and the National Register.
On its age, its old homes and the National Register, Mamaroneck is more historic than 88% of U.S. towns, #302 of 758 in New York. All 3 inputs are above most U.S. towns; its share of homes from before 1940 ranks highest and its National Register listings lowest.
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 Mamaroneck’s 5.5 sits near the middle of its state (36% of New York towns have fewer) while its 11 historic buildings outnumber those of 76% of U.S. towns.
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 →
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 1850, then grew more than tenfold.
22 censuses, 1790–2020.
U.S. Census Bureau decennial counts, from the census table on Mamaroneck’s Wikipedia page.
Every edition of the U.S. Geological Survey’s map of Mamaroneck. Tap a year, or press play to watch the town change.
U.S. Geological Survey historical topographic maps (public domain), via Esri’s collection of the scans. The red ring marks the center of Mamaroneck.
Fire insurance maps drew every building, what it was made of and what it was used for, so insurers could price the risk of fire. Pick a year, then a sheet.
1887Sheet 1 of 2Sanborn Map Company, via the Library of Congress. Editions published in 1930 or earlier, which are in the public domain.
From Wikipedia’s history of Mamaroneck.
The area that is now the town in Mamaroneck was purchased from the Siwanoy Wappaquewam on behalf of Manhatahan "another proprietors" and "by the consent of the other Indians," on September 23, 1661, by an Englishman named John Richbell who was a resident of Oyster Bay, Long Island.
Text from Wikipedia, licensed CC BY-SA 4.0.
Passages that mention Mamaroneck, cut from the printed page as they were published.
The village of Mamaroneck until within the last few years has suffered, from and Rye Neck has been benefited by, a singular cause as far as growth is concerned. In 1811 under a special act of the Legislature was incorporated “The Westchester County Manufacturing Society.” 1 The Act gave this corpo ration power to purchase, hold, and convey, lands and tenements, goods, wares, and merchandise what-
Text read by machine from the scan; it may contain errors.
These Richbell Mortgages on the Great Neck passed by assignments into the hands of Samuel Palmer, of Mamaroneck ; the first of a family of that name who have been closely and honourably connected with Mamaroneck from that day to this, and as they are still robust and numerous, will probably so continue indefinitely for the future. A Palmer was elected to a town office at the first recorded election i: Mamaroneck
Text read by machine from the scan; it may contain errors.
These Richbell Mortgages on the Great Neck passed by assignments into the hands of Samuel Palmer, of Mamaroneck ; the first of a family of that name who have been closely and honourably connected with Mamaroneck from that day to this, and as they are still robust and numerous, will probably so continue indefinitely for the future. A Palmer was elected to a town office at the first recorded election in Mamaroneck
Text read by machine from the scan; it may contain errors.
The Town of Mamaroneck was erected as a Town with its present boundaries by the "Act for dividing the Counties of this State into Towns/' passed the 7th of March 1788.^ The language of the Act is, "And all that part of the said County of Westchester, bounded southerly by New Rochelle, easterly by the Sound, Northerly by Mamaroneck River, and westerly by the Town of Scarsdale, shall be, and hereby is,
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.
Woven from the archive, old maps, post office records, the National Register and the people born here.
Born hereRichard Mott is born here
In the archivePlate 60- Mamaroneck, Westchester Co. N.Y. - Ryeneck, Town of Rye, Westchester Co. N.Y
On the mapFirst mapped by the U.S. Geological Survey
Born hereMorgan Farley is born here
In the archiveCalloway residence, stable
Born hereAnna Marguerite McCann is born here
Born hereGail Sheehy is born here2 decades in the archive, from the 1870s to the 1900s. Scroll each row; tap a photo for its story.
No then-and-now pairs yet. Take a photo from the same spot as an old one and they appear here side by side.
Find the spot, match the angle, and add your photo. It becomes the first then-and-now pair on Mamaroneck’s page.
Retake this view · +15The country’s official list of buildings and places worth saving.
National Park Service, National Register of Historic Places. Photos from Wikimedia Commons, credited on each place’s page.
Writers, athletes, leaders and more, ranked by how widely they’re known.
Most archives stop around 1920. The photos from after that are in family albums, not libraries.
Each neighbor’s History grade, on the same three inputs.
The Mamaroneck post office opened in 1812, the earliest record of the town by name (U.S. post office records).
Mamaroneck is more historic than 88% of U.S. towns, #302 of 758 in New York. 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.
38% of Mamaroneck’s homes were built before 1940 (Census estimate, ±6.0 points), against a typical 27% for a New York town; the median home was built in 1953.
What the archives can’t tell you, neighbors can.
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 (1), the Library of Congress (5), Wikipedia, Wikidata and Wikipedia for famous people, U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia), Sanborn fire insurance maps (Library of Congress) 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.
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