New London County, CT Elevation & Topographic Map

Topographic elevation map of New London County, Connecticut, shaded from sea level on Baker Cove to 648 ft on Gates Hill
Elevation
650 ft 200 m490 ft 150 m410 ft 125 m240 ft 75 m81 ft 25 m0 ft 0 m
Contours every 500 ft, bold every 2,500 ft
USGS 3DEP · U.S. Census Bureau
⤓ Download this map
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

New London County averages about 250 ft (75 m) above sea level across all its land. Its ground runs from sea level on Baker Cove to 648 ft on Gates Hill.

Average elevation
250 ft 75 m
all land inside the county
Highest
648 ft 198 m
on Gates Hill
Lowest
0 ft 0 m
at sea level on Baker Cove

New London County spans about 650 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 land250 ft75 m
Highest point
Inside the county, on Gates Hill (NGS survey height)
648 ft198 m
Lowest point
Where the land meets Baker Cove
0 ft0 m

Elevation profile, west to east

27 mi west to east through Norwich.

Topographic Map

Topographic elevation map of New London County, Connecticut, shaded from sea level on Baker Cove to 648 ft on Gates Hill
County boundary (dashed) over shaded terrain, with contours every 40 ft (12 m).
Location
County in Connecticut, United States
Population
271,289 2024 est., sum of towns
Land area
665.1 sq mi + 106.9 sq mi water
Density
408 per sq mi
Time zone
Eastern UTC−5 / −4
Landform region
New England 99%
Drains to
Long Island Sound
Note
Connecticut replaced counties with planning regions for Census data in 2022; this page uses the 2020 county boundary.
⤓ Download this map

WebP, 1200 × 900. Free to use: credit “ElevationOf.com” with a link to this page.

Sources: U.S. Census Bureau, USGS

Nearby Places

Neighboring historical counties sharing a border, by average

  1. Tolland County580 ft
  2. Windham County470 ft
  3. Hartford County320 ft
  4. Kent County, RI290 ft
  5. Middlesex County280 ft
  6. New London County250 ft
  7. Washington County, RI150 ft
  8. Suffolk County, NY73 ft

Rankings by average elevation

Peaks and hills highest inside

  • Gates Hill648 ft
  • Commons Hill640 ft
  • Sweet Hill640 ft
  • Bare Hill620 ft
  • Owunnegunset Hill610 ft
All 37 towns in New London County by typical elevation
  1. Colchester470 ft
  2. Lebanon450 ft
  3. Salem430 ft
  4. Voluntown380 ft
  5. Bozrah350 ft
  6. Franklin340 ft
  7. Montville260 ft
  8. Oxoboxo River250 ft
  9. Mashantucket240 ft
  10. Lisbon220 ft
  11. Sprague210 ft
  12. Ledyard200 ft
  13. North Stonington200 ft
  14. Old Mystic190 ft
  15. Griswold180 ft
  16. Preston160 ft
  17. Lyme150 ft
  18. Jewett City140 ft
  19. Norwich130 ft
  20. Conning Towers-Nautilus Park120 ft
  21. Baltic110 ft
  22. Groton92 ft
  23. Waterford89 ft
  24. City of Groton76 ft
  25. East Lyme76 ft
  26. New London70 ft
  27. Gales Ferry64 ft
  28. Noank52 ft
  29. Old Lyme44 ft
  30. Pawcatuck43 ft
  31. Stonington38 ft
  32. Long Hill38 ft
  33. Mystic28 ft
  34. Niantic25 ft
  35. Poquonock Bridge12 ft
  36. Borough of Stonington9 ft
  37. Groton Long Point5 ft
How we measure
  • Average: every USGS 3DEP bare-earth cell of land inside the Census county boundary (Census 2020), 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.
  • 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, −19 ft at 41.3438° N, 72.0826° W, is in such a hollow or patch and is not counted; this coastal land's lowest point is sea level on the coast.
  • Nearby Places: neighboring historical 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.
  • Population: the 2024 estimates of the towns that made up the county in 2020 (Census no longer estimates Connecticut's counties).
  • 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.