Theresa is a town in Jefferson County, New York, home to about 2,621 people across 65 square miles. Its ZIP code is 13691, and parts of 13673 and 13679 are in Theresa too.
Homes sold for a median of $147 per square foot in the three months ending August 2026, a balanced market.
Mostly Theresa; also Le Ray and Alexandria
Mostly Philadelphia; part is in Theresa
Mostly Alexandria; part is in Theresa
Each card is that ZIP code’s whole market, including any part outside Theresa. Seller’s market: under 4 months of supply; buyer’s market: over 6. Methodology
We’re writing up Theresa’s story and what everyday life there is like, for people thinking about moving in.
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| Nearest major airport | Syracuse Hancock International Airport (SYR)79 miles away |
|---|---|
| Closer regional airport | Watertown International Airport (ART)20 miles away |
| Nearest city of 250,000+ | Buffalo, NY179 miles away |
| Nearest city of 1 million+ | New York, NY264 miles away |
Straight-line distances from the center of Theresa; 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.
Theresa had 2,648 residents in the 2020 census, up 10% since 2000.
It’s the 553rd largest of 1,007 towns in New York by population.
Jefferson County grew from 76,748 residents in 1900 to 116,721 in 2020.
Jefferson County, 1900–2020
Source: U.S. Census Bureau decennial censuses (counties 1900–1990 from the Bureau’s historical county file).
Average highs peak around 79°F in summer, and winter lows average 5°F. About 39.9 inches of rain and melted snow fall in a typical year, with about 92 inches of snow.
Source: NOAA 1991–2020 climate normals, Gouverneur 3 Nw, NY weather station (16 miles away).
28,622 jobs at 2,348 businesses in Jefferson County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
1 doctors and other health care providers list an office in Theresa.
Nearest hospitals
Providers with an office here
| Nurse practitioners and physician assistants | 1 |
|---|
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)
Grocery stores
Pharmacies
Libraries (1 nearby)
Museums (1 nearby)
Counts are within about 5.5 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.
Notable people born here
Source: Wikidata (wikidata.org), the free knowledge base; people are listed by place of birth.
Public schools here are run by Indian River Central School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Theresa Primary SchoolTheresa | Pre-K–3 | 163 | Public | 1.4 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 Le Ray, Alexandria, Philadelphia, Rossie, Antwerp and Hammond.
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.