North Castle is a town in Westchester County, New York, home to about 12,228 people across 24 square miles. Its ZIP code is 10504, and parts of 10506, 10603 and 10604 are in North Castle too.
Homes sold for a median of $531 per square foot in the three months ending August 2026, a seller’s market.
All in North Castle
Mostly Bedford; part is in North Castle
Mostly Greenburgh; part is in North Castle
Mostly White Plains; part is in North Castle
Each card is that ZIP code’s whole market, including any part outside North Castle. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up North Castle’s story and what everyday life there is like, for people thinking about moving in.
Are you a local agent who knows North Castle well? Agents who advertise here will be able to write the guide. Advertise on OfferBacked
| Nearest major airport | LaGuardia Airport (LGA)27 miles away |
|---|---|
| Closer regional airport | Westchester County Airport (HPN)5 miles away |
| Nearest city of 250,000+ | New York, NY36 miles away |
Straight-line distances from the center of North Castle; driving is longer.
Source: Airports from OurAirports (scheduled passenger service); city centers and populations from the U.S. Census Bureau.
Source: Members of Congress from the congress-legislators project; districts from the Census Bureau’s relationship files; governor and mayor from Wikidata.
North Castle had 12,408 residents in the 2020 census, up 14% since 2000.
It’s the 184th largest of 1,007 towns in New York by population.
Westchester County grew from 184,257 residents in 1900 to 1,004,457 in 2020.
Westchester County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 83°F in summer, and winter lows average 22°F. About 47.7 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Westchester Co Ap, NY weather station (5 miles away).
389,560 jobs at 31,174 businesses in Westchester County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
119 doctors and other health care providers list an office in North Castle.
Nearest hospitals
Providers with an office here
| Primary care doctors | 11 |
|---|---|
| Specialist doctors | 19 |
| Dentists | 9 |
| Nurse practitioners and physician assistants | 2 |
| Mental health providers | 22 |
| Physical and occupational therapists | 48 |
| Optometrists | 2 |
| Chiropractors | 6 |
| Pharmacies | 3 |
Source: Hospitals from CMS Hospital General Information (ratings are CMS overall star ratings); straight-line distances; providers from the CMS National Plan and Provider Enumeration System (NPPES), by practice address and primary specialty.
Parks (6 nearby)
Grocery stores (1 nearby)
Pharmacies
Libraries (1 nearby)
Museums
Theaters and performance venues
Counts are within about 3.5 miles of the center of town.
Source: Map data © OpenStreetMap contributors (openstreetmap.org/copyright), as mapped by volunteers; it can miss places or include closed ones.
Public schools here are run by Byram Hills Central School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Coman Hill SchoolArmonk | K–2 | 575 | Public | 0.2 mi |
| Wampus SchoolArmonk | 3–5 | 547 | Public | 1.5 mi |
| H C Crittenden Middle SchoolArmonk | 6–8 | 474 | Public | 1.5 mi |
| Byram Hills High SchoolArmonk | 9–12 | 740 | Public | 0.6 mi |
| School | Grades | Students | Affiliation | Distance |
|---|---|---|---|---|
| Montessori Childrens RoomArmonk | Pre-K–1 | 15 | Nonsectarian | 2.3 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools; Private School Universe Survey (2023-2024) for private schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with White Plains, Harrison, Greenburgh, Bedford, Rye Town and Pound Ridge.
Town boundaries don’t always match ZIP codes: a ZIP code can cross into neighboring towns, and a town can share a ZIP code with its neighbors. Facts describe the town itself; market figures describe whole ZIP codes.