St. Lawrence County, NY Elevation & Topographic Map
Elevation
2,690 ft 820 m2,060 ft 625 m1,740 ft 530 m1,100 ft 335 m470 ft 145 m150 ft 45 m
Zoom in for contour lines
USGS 3DEP · U.S. Census Bureau
How to use this mapviews, tools and data
- Elevation
- Ground colored by height from green (lowest) to white (highest), with contour lines every 40–500 ft (USGS data).
- Satellite
- A 2016 satellite photo at 33 ft (10 m) detail; contours off.
- 3D
- Tilt and turn the terrain; hills are raised 1.5×, or set ×1 for true height.
- Click or tap anywhere
- The exact elevation of that spot in ft and m.
- Measure
- Pick two points for the climb, descent and grade along a straight line.
- County area
- Fades everything outside the official county boundary (US Census).
Elevation Data
St. Lawrence County averages about 810 ft (245 m) above sea level across all its land. Its ground runs from 150 ft on the northeast side to 2,690 ft on Mount Matumbla.
Average elevation
810 ft 245 m
all land inside the county
Highest
2,690 ft 820 m
on Mount Matumbla
Lowest
150 ft 45 m
on the northeast side
St. Lawrence County spans about 2,540 ft of height, so no single spot tells the whole story. The ruler shows where most of its land lies, and where the other numbers you'll see come from.
| Figure | Elevation |
|---|---|
| Average of all land | 810 ft245 m |
| Highest point Inside the county, on Mount Matumbla (3DEP terrain model; no NGS survey height) | 2,690 ft820 m |
| Lowest point Inside the county, on the northeast side | 150 ft45 m |
Elevation profile, south to north
64 mi south to north through Potsdam.
Topographic Map
- Location
- County in New York, United States
- Population
- 106,198 2024 est.
- Land area
- 2,679.5 sq mi + 141.7 sq mi water
- Density
- 40 per sq mi
- Time zone
- Eastern UTC−5 / −4
- Landform regions
- Adirondack 60%, St. Lawrence Valley 39%
- Drains to
- Canada
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Sources: U.S. Census Bureau, USGS
Nearby Places
Neighboring counties sharing a border, by average
- Hamilton County2,000 ft
- Herkimer County1,530 ft
- Franklin County1,390 ft
- Lewis County1,300 ft
- St. Lawrence County810 ft
- Jefferson County550 ft
Rankings by average elevation
- Counties in New York35th highest of 62
- Counties in the United States1,793rd highest of 3,151
Peaks and hills highest inside
- Mount Matumbla2,690 ft
- Silver Lake Mountain, St. Lawrence County2,610 ft
- Long Tom Mountain, St. Lawrence County2,610 ft
- Arab Mountain2,550 ft
- Bear Mountain, St. Lawrence County2,520 ft
All 51 towns in St. Lawrence County by typical elevation
- Cranberry Lake1,580 ft
- Piercefield1,570 ft
- Clifton1,500 ft
- Star Lake1,490 ft
- Fine1,430 ft
- Colton990 ft
- Clare880 ft
- Parishville830 ft
- Hopkinton830 ft
- Pitcairn790 ft
- Russell750 ft
- Edwards710 ft
- Pierrepont640 ft
- Fowler600 ft
- Hannawa Falls580 ft
- Hermon530 ft
- Hailesboro490 ft
- DeKalb Junction450 ft
- Village of Potsdam440 ft
- Town of Lawrence440 ft
- Gouverneur440 ft
- Village of Gouverneur440 ft
- Potsdam430 ft
- Rossie430 ft
- De Kalb420 ft
- Richville390 ft
- Canton380 ft
- Village of Canton380 ft
- Village of Hammond370 ft
- Hammond360 ft
- Stockholm360 ft
- Macomb340 ft
- Norwood330 ft
- Winthrop330 ft
- Morristown320 ft
- Heuvelton320 ft
- Lisbon320 ft
- Rensselaer Falls320 ft
- De Peyster320 ft
- Brasher Falls310 ft
- Oswegatchie310 ft
- Madrid300 ft
- Ogdensburg280 ft
- Waddington270 ft
- Norfolk270 ft
- Village of Waddington260 ft
- Brasher250 ft
- Louisville240 ft
- Village of Massena230 ft
- Massena220 ft
- Akwesasne partly190 ft
How we measure
- Average: every USGS 3DEP bare-earth cell of land inside the Census county boundary (TIGER/Line, Jan 1 2026), weighted equally, on a 2 arc-second (≈200 ft, 62 m) grid, coarsened from 1 arc-second so the whole area fits one run. Land means the boundary minus Census area water (on this grid, water areas of at least half a cell).
- Highest and lowest: the highest land cell, re-read at 1 arc-second around the 25 highest grid cells; it is a named summit, so its height is the peak method: the 3DEP top on a ~7 ft (2 m) window, or the NGS published height when a survey mark sits within 160 ft (50 m) of it. Lowest: the lowest land cell, re-read at 1 arc-second around the 25 lowest grid cells; coastal ground within 3 ft (1 m) of named tidal water counts as sea level.
- Pits: the lowest point is the lowest ground outside closed hollows (quarry floors, mine pits, terrain-model artifacts): any hollow under 0.4 sq mi (1 km²), and any hollow under 2 sq mi (5 km²) whose floor is more than 100 ft (30 m) below its rim; and outside patches below sea level of under 0.4 sq mi (1 km²). The single lowest 3DEP cell, 58 ft at 44.7815° N, 74.9915° W, is in such a hollow or patch and is not counted.
- Nearby Places: neighboring counties and rankings use each one's average elevation, on its own grid, the same figure its page shows. Peaks and hills: the highest summits inside the county with at least 980 ft (300 m) of prominence, then the highest federal (GNIS) summits inside it when there are fewer than 5; each is the 3DEP top on a ~7 ft (2 m) window, or the NGS published height when a usable survey mark sits within 160 ft (50 m) of it (shown as published).
- Towns: each town's typical elevation (population-weighted median of its own 2020 blocks at 1 arc-second); a town is listed when any of its 2020 residents live in the county.
- Rounding: computed heights are rounded to 10 ft (5 m), or to 1 ft (1 m) under 100 ft; 3DEP is good to about a meter, not a foot. Published figures (NGS survey heights) are shown as their publisher gives them.
- Datum: North American Vertical Datum of 1988 (NAVD 88). NGS plans to replace NAVD 88 with a new datum (NAPGD2022); heights will then shift slightly.
- Sources: USGS 3DEP, GNIS, Watershed Boundary Dataset and physiographic provinces; U.S. Census Bureau (TIGER boundaries and water, 2020 blocks, 2024 population estimates, county adjacency); NOAA NGS survey heights; BTS time zones. All public domain.