Lewis County, NY Elevation & Topographic Map

Topographic elevation map of Lewis County, New York, shaded from 610 ft on the north side to 2,110 ft on Gomer Hill
Elevation
2,110 ft 645 m1,740 ft 530 m1,550 ft 475 m1,180 ft 360 m800 ft 245 m610 ft 185 m
Zoom in for contour lines
USGS 3DEP · U.S. Census Bureau
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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

Lewis County averages about 1,300 ft (395 m) above sea level across all its land. Its ground runs from 610 ft on the north side to 2,110 ft on Gomer Hill.

Average elevation
1,300 ft 395 m
all land inside the county
Highest
2,110 ft 645 m
on Gomer Hill
Lowest
610 ft 185 m
on the north side

Lewis County spans about 1,500 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.

FigureElevation
Average of all land1,300 ft395 m
Highest point
Inside the county, on Gomer Hill (3DEP terrain model; no NGS survey height)
2,110 ft645 m
Lowest point
Inside the county, on the north side
610 ft185 m

Elevation profile, south to north

50 mi south to north through Lowville.

Topographic Map

Topographic elevation map of Lewis County, New York, shaded from 610 ft on the north side to 2,110 ft on Gomer Hill
County boundary (dashed) over shaded terrain, with contours every 200 ft (61 m).
Location
County in New York, United States
Population
26,570 2024 est.
Land area
1,276.3 sq mi + 15.3 sq mi water
Density
21 per sq mi
Time zone
Eastern UTC−5 / −4
Landform regions
Appalachian Plateaus 53%, Adirondack 47%
Drains to
Great Lakes 83%, Canada 17%
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Sources: U.S. Census Bureau, USGS

Nearby Places

Neighboring counties sharing a border, by average

  1. Herkimer County1,530 ft
  2. Lewis County1,300 ft
  3. Oneida County920 ft
  4. St. Lawrence County810 ft
  5. Oswego County580 ft
  6. Jefferson County550 ft

Rankings by average elevation

Peaks and hills highest inside

  • Gomer Hill2,110 ft
  • Bald Mountain, Lewis County1,650 ft
  • Mount Tom, Lewis County1,600 ft
  • Buck Mountain, Lewis County1,460 ft
  • Big Hill, Lewis County1,270 ft
All 26 towns in Lewis County by typical elevation
  1. Montague1,720 ft
  2. Lewis, Lewis County1,500 ft
  3. Harrisburg1,500 ft
  4. Pinckney1,460 ft
  5. Osceola1,290 ft
  6. Village of Turin1,260 ft
  7. Constableville1,260 ft
  8. West Turin1,260 ft
  9. Turin1,250 ft
  10. Copenhagen1,200 ft
  11. Martinsburg1,150 ft
  12. Leyden1,070 ft
  13. Denmark990 ft
  14. Lyonsdale930 ft
  15. Greig930 ft
  16. Port Leyden900 ft
  17. Lowville890 ft
  18. Village of Lowville880 ft
  19. Watson860 ft
  20. Croghan840 ft
  21. Village of Croghan840 ft
  22. Diana840 ft
  23. Lyons Falls830 ft
  24. New Bremen830 ft
  25. Castorland790 ft
  26. Annsville partly650 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 1 arc-second (≈100 ft, 30 m) grid. Land means the boundary minus Census area water.
  • Highest and lowest: the highest land cell; 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; coastal ground within 3 ft (1 m) of named tidal water counts as sea level.
  • 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.