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Advertise here →Mount Sinai, NY · Census-designated place
Mount Sinai, New York houses and real estate market data.
Houses in Mount Sinai, NY (Suffolk County) — market data for Mount Sinai houses and the whole local market.
Census-designated place · Census GEOID 3649066
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Clearlake Oaks Canal-Front Oasis
$374,999 • 3 Beds • 2 Baths • 1,204 Sq Ft
554 Keys, Clearlake Oaks, CA 95423
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*Listed by Scott Brown, EXP Realty, DRE #01956840. Inquiries delivered directly to listing agent. Search.USAHouses.com*
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Scott Brown - EXP Realty
Scott@USAHouses.com
Call/Text (707) 474-8855
👉 Click Anywhere on Ad for More Info / Listing Page
Mount Sinai, NY is a Census-designated place in Suffolk County, New York — this guide covers houses in Mount Sinai and the whole local market: resale homes, condos, land, and new construction.
Info from government sites and builders may have provided source info.
Open map pin ↗ · 40.94178, -73.020242
At a glance
Mount Sinai market snapshot
Place type
Census-designated place
County
Suffolk County
Map pin
40.94178, -73.020242
Census GEOID
3649066
Land area
6.00 sq mi
Market data compiled from public sources; deemed reliable but not guaranteed; verify independently. See About
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Advertise here →Why Mount Sinai
What makes Mount Sinai different
Census-designated place
The U.S. Census Bureau lists Mount Sinai as a Census-designated place in Suffolk County, New York — a settled community that is not an incorporated city, town, or village. This page uses the same /new-york/mount-sinai/ guide pattern as incorporated places.
Nearby
Places around Mount Sinai
County guide: Suffolk County — cities, market context, and local resources for the county that includes Mount Sinai.
USAHouses.com also publishes Census place pages for other communities in the same county as Mount Sinai.
Nearby communities include Miller Place, Port Jefferson, Port Jefferson Station, Terryville, Belle Terre, Sound Beach, Poquott, East Setauket, Coram, Rocky Point, Middle Island, Setauket, Selden, Stony Brook University, Shoreham, Centereach.
Miller Place market data
Nearby city · ~1.4 mi
Port Jefferson market data
Nearby city · ~1.7 mi
Port Jefferson Station market data
Nearby city · ~2.6 mi
Terryville market data
Nearby city · ~2.7 mi
Belle Terre market data
Nearby city · ~2.8 mi
Sound Beach market data
Nearby city · ~3.0 mi
Poquott market data
Nearby city · ~3.8 mi
East Setauket market data
Nearby city · ~4.1 mi
Coram market data
Nearby city · ~4.2 mi
Rocky Point market data
Nearby city · ~4.4 mi
Middle Island market data
Nearby city · ~5.0 mi
Setauket market data
Nearby city · ~5.0 mi
Selden market data
Nearby city · ~5.0 mi
Stony Brook University market data
Nearby city · ~5.7 mi
Shoreham market data
Nearby city · ~6.0 mi
Centereach market data
Nearby city · ~6.0 mi
Adjacent-county Census places with USAHouses.com pages: Laurel Hollow (~24.6 mi), Woodbury (~25.1 mi), Cove Neck (~25.2 mi), Oyster Bay Cove (~26.0 mi), Plainview (~26.1 mi), Centre Island (~26.4 mi), Old Bethpage (~26.4 mi), Farmingdale (~26.6 mi), Syosset (~26.6 mi), Oyster Bay (~27.2 mi), South Farmingdale (~27.3 mi), East Norwich (~27.3 mi), Bethpage (~27.7 mi), Muttontown (~28.1 mi), Plainedge (~28.2 mi), Bayville (~28.3 mi).
Census & home facts
Mount Sinai data from published sources
County FHFA annual change (2025)
5.42%
County median listing price (FRED/Realtor.com) (2026-06-01)
$937,000
Census place type
CDP
County
Suffolk County
Land area (Census Gazetteer 2024)
6.00 sq mi
Census GEOID
3649066
Census ACS, FHFA, and FRED figures are labeled with the year present in existing CSVs. Subject to change / confirm locally.
NewUSAHouses.com communities
Closest verified new-home communities near Mount Sinai
Availability and pricing are controlled by the builder and may change; confirm with the builder.
Manhasset Crest ↗
Toll Brothers · Manhasset, New York · ~35.4 mi · from $3,098,000
2700 Westchester ↗
Toll Brothers · Harrison, New York · ~35.6 mi · from $1,600,000
Enclave at Armonk ↗
Toll Brothers · Armonk, New York · ~38.1 mi · from $1,432,995
The Rose at Great Neck ↗
McKinley Homes · Great Neck, New York · ~38.5 mi
Regency at Rivington 55+ ↗
Toll Brothers · Danbury, Connecticut · ~40.1 mi · from $912,995
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Common questions
Mount Sinai FAQ
What kind of place is Mount Sinai, NY?
The U.S. Census Bureau lists Mount Sinai as a Census-designated place in Suffolk County, New York — a settled community that is not an incorporated city, town, or village.
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