THE ST. LAWRENCE COUNTY LAND BRIEF
Land in the
St. Lawrence Lowlands setting.
St. Lawrence County has 2,679.5 square miles of land in New York. 4 mapped landscape regions meet across St. Lawrence County: St. Lawrence Lowlands, Northern and Western Adirondack Foothills, Upper St. Lawrence Valley, among others.
Glacially shaped lowlands and irregular plains border the Great Lakes and adjacent hills. The lakes influence regional weather, while local landforms reflect both glacial deposits and former shorelines.
Regional context: Eastern Great Lakes Lowlands ↗ · Regional mapping across the county footprint
Where the landscape changes
St. Lawrence County intersects 4 mapped regional units. The largest mapped shares are:
- St. Lawrence Lowlands40.6%
- Northern and Western Adirondack Foothills30.7%
- Upper St. Lawrence Valley19.2%
- Acid Sensitive Adirondacks9.5%
Northeastern Highlands in St. Lawrence County
Forested hills and mountains span northern New England, the Adirondacks and higher Catskills. Glacial lakes and steep streams accompany a transition between northern hardwood and spruce-fir forests.
Read the regional source ↗Finding your parcel within St. Lawrence County
The atlas lists 58 cities, towns, townships, and Census communities associated with St. Lawrence County, including Colton, Hopkinton, Fine. The list includes overlapping geography types and does not divide the county into exclusive service areas.
St. Lawrence County by land and water
The Census records 141.7 square miles of water within St. Lawrence County, or 5% of its total area. That share is close to St. Lawrence County’s 5%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, St. Lawrence County has 44.5 times the land area of nearby Pierrepont town (60.2 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Franklin County, Hamilton County, Herkimer County, Jefferson County, Lewis County within New York. A tract near one of these lines should be matched to the county identifier on its own records.

