Sullivan County, NY Elevation & Topographic Map

Topographic elevation map of Sullivan County, New York, shaded from 350 ft on the southeast side to 3,120 ft on the north side
Elevation
3,120 ft 950 m2,420 ft 740 m2,080 ft 635 m1,390 ft 425 m700 ft 215 m350 ft 105 m
Contours every 500 ft, bold every 2,500 ft
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

Sullivan County averages about 1,420 ft (435 m) above sea level across all its land. Its ground runs from 350 ft on the southeast side to 3,120 ft on the north side.

Average elevation
1,420 ft 435 m
all land inside the county
Highest
3,120 ft 950 m
on the north side
Lowest
350 ft 105 m
on the southeast side

Sullivan County spans about 2,770 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 land1,420 ft435 m
Highest point
Inside the county, on the north side
3,120 ft950 m
Lowest point
Inside the county, on the southeast side
350 ft105 m

Elevation profile, south to north

33 mi south to north through Thompson.

Topographic Map

Topographic elevation map of Sullivan County, New York, shaded from 350 ft on the southeast side to 3,120 ft on the north side
County boundary (dashed) over shaded terrain, with contours every 200 ft (61 m).
Location
County in New York, United States
Population
80,450 2024 est.
Land area
968.1 sq mi + 28.5 sq mi water
Density
83 per sq mi
Time zone
Eastern UTC−5 / −4
Landform region
Appalachian Plateaus 96%
Drains to
Atlantic Ocean
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Sources: U.S. Census Bureau, USGS

Nearby Places

Neighboring counties sharing a border, by average

  1. Delaware County1,840 ft
  2. Wayne County, PA1,480 ft
  3. Sullivan County1,420 ft
  4. Pike County, PA1,260 ft
  5. Ulster County1,140 ft
  6. Orange County630 ft

Rankings by average elevation

Peaks and hills highest inside

  • Denman Mountain3,050 ft
  • Blue Hill, Sullivan County2,740 ft
  • Rattle Hill2,580 ft
  • Slawson Mountain2,500 ft
  • Burnt Hill, Sullivan County2,300 ft
All 45 towns in Sullivan County by typical elevation
  1. Village of Liberty1,600 ft
  2. Liberty1,600 ft
  3. Neversink1,600 ft
  4. Fremont1,560 ft
  5. Rockland1,550 ft
  6. Rock Hill1,530 ft
  7. Monticello1,530 ft
  8. Callicoon1,510 ft
  9. Thompson1,500 ft
  10. Loch Sheldrake1,500 ft
  11. Livingston Manor1,460 ft
  12. Kiamesha Lake1,450 ft
  13. White Lake1,400 ft
  14. Swan Lake1,370 ft
  15. Hurleyville1,360 ft
  16. Bridgeville1,360 ft
  17. Kauneonga Lake1,330 ft
  18. Forestburgh1,310 ft
  19. Bethel1,300 ft
  20. Roscoe1,290 ft
  21. Fallsburg1,280 ft
  22. Lake Huntington1,270 ft
  23. Hankins1,270 ft
  24. Woodbourne1,270 ft
  25. South Fallsburg1,250 ft
  26. Smallwood1,240 ft
  27. Cochecton1,210 ft
  28. Lumberland1,200 ft
  29. Woodridge1,190 ft
  30. Mongaup Valley1,190 ft
  31. Wurtsboro Hills1,170 ft
  32. Town of Highland1,170 ft
  33. Delaware1,140 ft
  34. Grahamsville1,140 ft
  35. Mountain Dale1,130 ft
  36. Jeffersonville1,120 ft
  37. Eldred1,110 ft
  38. Tusten1,110 ft
  39. Hortonville1,090 ft
  40. Callicoon, Sullivan County880 ft
  41. Narrowsburg750 ft
  42. Mamakating630 ft
  43. Barryville620 ft
  44. Wurtsboro550 ft
  45. Bloomingburg480 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. 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.