St. Lawrence County
Also known as St. Lawrence County, New York, Saint Lawrence County, New York, St. Lawrence County, NY
county in New York, United States
Key facts
- Country
- United States
- State
- New York
- Founded
- 1802 ( 1802 )
- Named after
- Saint Lawrence River
- Seat
- Canton
- Total
- 2,821 sq mi (7,310 km )
- Land
- 2,680 sq mi (6,900 km )
- Water
- 141 sq mi (370 km ) 5.0%
- Estimate 2025
- 105,488
- Density
- 39.6/sq mi (15.3/km )
- Time zone
- UTC−5 ( Eastern )
- Summer dst
- UTC−4 ( EDT )
- Congressional district
~14 min read
Article
St. Lawrence County is the northernmost county in the U.S. state of New York. As of the 2020 census, the population was 108,505. The county seat is Canton. The county is named for the Saint Lawrence River. This was as named by early French explorer Jacques Cartier for the Christian saint Lawrence of Rome, as he visited the river on the saint's feast day. The county is part of the North Country region of the state.
St. Lawrence County comprises the Ogdensburg-Massena, NY Micropolitan Statistical Area and is New York's largest county by area.