Williamstown is a town in Oswego County, New York, home to about 1,522 people across 39 square miles. Its ZIP code is 13493, and parts of 13302 are in Williamstown too.
Homes sold for a median of $176 per square foot in the three months ending August 2026, a buyer’s market.
Mostly Williamstown; also Amboy and Albion Town (Oswego County)
Mostly Albion Town (Oswego County); part is in Williamstown
Each card is that ZIP code’s whole market, including any part outside Williamstown. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
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| Nearest major airport | Syracuse Hancock International Airport (SYR)24 miles away |
|---|---|
| Nearest city of 250,000+ | Buffalo, NY153 miles away |
| Nearest city of 1 million+ | New York, NY217 miles away |
Straight-line distances from the center of Williamstown; 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.
Williamstown had 1,335 residents in the 2020 census, down 1% since 2000.
It’s the 761st largest of 1,007 towns in New York by population.
Oswego County grew from 70,881 residents in 1900 to 117,525 in 2020.
Oswego 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 11°F. About 50 inches of rain and melted snow fall in a typical year, with about 151 inches of snow.
Source: NOAA 1991–2020 climate normals, Camden, NY weather station (8 miles away).
22,804 jobs at 2,093 businesses in Oswego County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
3 doctors and other health care providers list an office in Williamstown.
Nearest hospitals
Providers with an office here
| Mental health providers | 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 (2 nearby)
Libraries (1 nearby)
Counts are within about 4 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.
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Shares ZIP codes with Amboy, Albion Town (Oswego County), Orwell, Parish and Redfield.
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.