Sussex County, DE Elevation & Topographic Map

Topographic elevation map of Sussex County, Delaware, shaded from sea level on Delaware Bay to 200 ft on the southwest side
Elevation
200 ft 60 m150 ft 45 m130 ft 40 m75 ft 23 m25 ft 8 m0 ft 0 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

Sussex County averages about 32 ft (10 m) above sea level across all its land. Its ground runs from sea level on Delaware Bay to 200 ft on the southwest side.

Average elevation
32 ft 10 m
all land inside the county
Highest
200 ft 60 m
on the southwest side
Lowest
0 ft 0 m
at sea level on Delaware Bay

Sussex County spans about 200 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 land32 ft10 m
Highest point
Inside the county, on the southwest side
200 ft60 m
Lowest point
Where the land meets Delaware Bay
0 ft0 m

Elevation profile, south to north

32 mi south to north through Milford.

Topographic Map

Topographic elevation map of Sussex County, Delaware, shaded from sea level on Delaware Bay to 200 ft on the southwest side
County boundary (dashed) over shaded terrain, with contours every 10 ft (3 m).
Location
County in Delaware, United States
Population
271,134 2024 est.
Land area
936.2 sq mi + 260.2 sq mi water
Density
290 per sq mi
Time zone
Eastern UTC−5 / −4
Landform region
Coastal Plain 99%
Drains to
Atlantic Ocean
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Sources: U.S. Census Bureau, USGS

Nearby Places

Neighboring counties sharing a border, by average

  1. Caroline County, MD45 ft
  2. Kent County39 ft
  3. Sussex County32 ft
  4. Wicomico County, MD31 ft
  5. Worcester County, MD22 ft
  6. Cape May County, NJ13 ft
  7. Dorchester County, MD11 ft

Rankings by average elevation

Peaks and hills highest inside

  • Sand Hill77 ft
  • Wilson Hill53 ft
  • Easter Hill48 ft
  • Terrapin Hill44 ft
  • Pine Hill42 ft
All 27 towns in Sussex County by typical elevation
  1. Delmar50 ft
  2. Ellendale49 ft
  3. Georgetown49 ft
  4. Greenwood46 ft
  5. Lincoln42 ft
  6. Bridgeville42 ft
  7. Selbyville33 ft
  8. Frankford32 ft
  9. Milton31 ft
  10. Seaford28 ft
  11. Milford28 ft
  12. Laurel26 ft
  13. Dagsboro25 ft
  14. Millsboro25 ft
  15. Bethel22 ft
  16. Rehoboth Beach19 ft
  17. Blades18 ft
  18. Lewes13 ft
  19. Millville12 ft
  20. Ocean View12 ft
  21. Long Neck10 ft
  22. Dewey Beach9 ft
  23. Henlopen Acres7 ft
  24. Bethany Beach6 ft
  25. South Bethany3 ft
  26. Slaughter Beach2 ft
  27. Fenwick Island2 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.
  • 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, −3 ft at 38.9429° N, 75.3085° 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 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.