THE LEWIS COUNTY LAND BRIEF
Land in the
Northern and Western Adirondack Foothills setting.
Lewis County has 1,276.3 square miles of land in New York. 5 mapped landscape regions meet across Lewis County: Northern and Western Adirondack Foothills, Tug Hill Plateau, Upper St. Lawrence Valley, among others.
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.
Regional context: Northeastern Highlands ↗ · Regional mapping across the county footprint
Where the landscape changes
Lewis County intersects 5 mapped regional units. The largest mapped shares are:
- Northern and Western Adirondack Foothills28.8%
- Tug Hill Plateau19.9%
- Upper St. Lawrence Valley17.9%
- Tug Hill Transition16.9%
- Acid Sensitive Adirondacks16.4%
Eastern Great Lakes Lowlands in Lewis County
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.
Read the regional source ↗Finding your parcel within Lewis County
The atlas lists 25 cities, towns, townships, and Census communities associated with Lewis County, including Croghan, Diana, Watson. The list includes overlapping geography types and does not divide the county into exclusive service areas.
Lewis County by land and water
The Census records 15.3 square miles of water within Lewis County, or 1.2% of its total area. That share is close to Lewis County’s 1.2%. This is geographic context; waterfront status and usable land must be checked at the parcel.
For scale, Lewis County has 672.8 times the land area of nearby Lowville village (1.9 square miles). These areas describe boundaries, not comparable property prices.
The Census boundary meets Herkimer County, Jefferson County, Oneida County, Oswego County, St. Lawrence County within New York. A tract near one of these lines should be matched to the county identifier on its own records.

