De Kalb is a town in St. Lawrence County, New York, home to about 2,067 people across 83 square miles. Its ZIP codes are 13630 and 13681, and parts of 13680 are in De Kalb too.
Homes sold for a median of $82 per square foot across 2 ZIP codes in the three months ending August 2026, and 0 of 2 were seller’s markets.
Mostly De Kalb; also Canton
Mostly De Kalb; also Gouverneur and Hermon
Mostly Canton; part is in De Kalb
Each card is that ZIP code’s whole market, including any part outside De Kalb. 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)103 miles away |
|---|---|
| Closer regional airport | Ogdensburg International Airport (OGS)15 miles away |
| Nearest city of 250,000+ | Buffalo, NY208 miles away |
| Nearest city of 1 million+ | New York, NY274 miles away |
Straight-line distances from the center of De Kalb; 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.
De Kalb had 2,375 residents in the 2020 census, up 7% since 2000.
It’s the 630th largest of 1,007 towns in New York by population.
St. Lawrence County grew from 89,083 residents in 1900 to 108,505 in 2020.
St. Lawrence 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 (13 miles away).
26,395 jobs at 1,826 businesses in St. Lawrence County. The biggest industries by employees:
Source: U.S. Census Bureau County Business Patterns 2023 (private employers; jobs counted where people work).
5 doctors and other health care providers list an office in De Kalb’s ZIP codes.
Nearest hospitals
Providers with an office here
| Nurse practitioners and physician assistants | 3 |
|---|---|
| Mental health providers | 1 |
| Physical and occupational therapists | 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.
Libraries (1 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 Hermon-Dekalb Central School District. Check each district’s attendance zones for a specific address.
| School | Grades | Students | Type | Distance |
|---|---|---|---|---|
| Hermon-Dekalb Central SchoolDekalb Junction | Pre-K–12 | 363 | 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 Canton, Lisbon, Gouverneur, Hermon, Oswegatchie and De Peyster.
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.