Most of Monsey was built recently: 6% of its homes predate 1940 and the median home dates from 2003. Below: maps from 1910 on and the census since 1970.
Rockland County was inhabited by the Munsee band of Lenape Native Americans, who were speakers of the Algonquian languages. Monsey Glen, a Native American encampment, is west of the intersection of State Route 59 and State Route 306. Numerous artifacts have been found there and some rock shelters are still visible. The Monsey railroad station, named from an alternate spelling of the Munsee Lenape, was built when the New York & Erie Railroad passed through the glen in 1841.
New York, a conference of Indians is described, at which, classed along with the Cayugas, Senecas, and Oneidas, a tribe of Munsies is mentioned. It may have been after this tribe that the village of Monsey is named (See History of Monsey .j Tradition says that a tribe of Ramapaughs “of sufficient importance to compete with the Mohawks,” dwelt in the “ Ramapo Pass.” Of this we cannot speak with as-
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Monsey, and was the first postmaster and station agent.* At the opening of the railroad an ordinary log pump was sunk by the authorities in the brook a few yards east of Spring Valley depot, around which a small platform was built, upon which two men used to stand while they pumped water into the engine.
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Scans and text from the Internet Archive. Books published in 1930 or earlier, which are in the public domain.
Timeline
Monsey, 1910 to 1993
Woven from the archive, old maps, post office records, the National Register and the people born here.
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 →
From Wikimedia Commons (6), Wikipedia, Wikidata and Wikipedia for famous people, U.S. Geological Survey historical maps, U.S. Census counts (via Wikipedia) 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.