Chesterfield is a town in Essex County, New York, home to about 2,492 people across 79 square miles. Its ZIP codes are 12944 and 12975, and parts of 12911 are in Chesterfield too.
Homes sold for a median of $121 per square foot across 2 ZIP codes in the three months ending August 2026, and 0 of 2 were seller’s markets.
Mostly Chesterfield; also Au Sable and Willsboro
All in Chesterfield
Mostly Au Sable; part is in Chesterfield
Each card is that ZIP code’s whole market, including any part outside Chesterfield. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Chesterfield’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Albany International Airport (ALB)122 miles away |
|---|---|
| Closer regional airport | Plattsburgh International Airport (PBG)10 miles away |
| Nearest city of 250,000+ | Boston, MA194 miles away |
| Nearest city of 1 million+ | New York, NY266 miles away |
Straight-line distances from the center of Chesterfield; 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.
Chesterfield had 2,476 residents in the 2020 census, up 3% since 2000.
It’s the 577th largest of 1,007 towns in New York by population.
Essex County grew from 30,707 residents in 1900 to 37,381 in 2020.
Essex County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 81°F in summer, and winter lows average 10°F. About 30.9 inches of rain and melted snow fall in a typical year.
Source: NOAA 1991–2020 climate normals, Plattsburgh Intl Ap, NY weather station (10 miles away).
10,192 jobs at 1,186 businesses in Essex County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
15 doctors and other health care providers list an office in Chesterfield’s ZIP codes.
Nearest hospitals
Providers with an office here
| Primary care doctors | 2 |
|---|---|
| Dentists | 1 |
| Mental health providers | 9 |
| Physical and occupational therapists | 3 |
| Pharmacies | 2 |
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 (2 nearby)
Pharmacies
Libraries (1 nearby)
Museums (2 nearby)
Counts are within about 6 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 Ausable Valley Central School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Keeseville Primary SchoolKeeseville | Pre-K–6 | 364 | Public | 1.1 mi |
Source: U.S. Department of Education, NCES: Common Core of Data (2024-2025) for public schools. Listed by address; we don’t rate schools.
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Shares ZIP codes with Au Sable and Willsboro.
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.