New Castle County, DE Elevation & Topographic Map

Topographic elevation map of New Castle County, Delaware, shaded from sea level on Delaware Bay to 450 ft on the north side
Elevation
450 ft 135 m340 ft 105 m280 ft 85 m170 ft 50 m56 ft 17 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

New Castle County averages about 95 ft (29 m) above sea level across all its land. Its ground runs from sea level on Delaware Bay to 450 ft on the north side.

Average elevation
95 ft 29 m
all land inside the county
Highest
450 ft 135 m
on the north side
Lowest
0 ft 0 m
at sea level on Delaware Bay

New Castle County spans about 450 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 land95 ft29 m
Highest point
Inside the county, on the north side
450 ft135 m
Lowest point
Where the land meets Delaware Bay
0 ft0 m

Elevation profile, south to north

34 mi south to north through Wilmington.

Topographic Map

Topographic elevation map of New Castle County, Delaware, shaded from sea level on Delaware Bay to 450 ft on the north side
County boundary (dashed) over shaded terrain, with contours every 40 ft (12 m).
Location
County in Delaware, United States
Population
588,093 2024 est.
Land area
426.3 sq mi + 67.7 sq mi water
Density
1,379 per sq mi
Time zone
Eastern UTC−5 / −4
Landform regions
Coastal Plain 84%, Piedmont 16%
Drains to
Atlantic Ocean
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Sources: U.S. Census Bureau, USGS

Nearby Places

Neighboring counties sharing a border, by average

  1. Chester County, PA450 ft
  2. Delaware County, PA240 ft
  3. Cecil County, MD170 ft
  4. New Castle County95 ft
  5. Gloucester County, NJ87 ft
  6. Salem County, NJ55 ft
  7. Kent County, MD46 ft
  8. Kent County39 ft

Rankings by average elevation

Peaks and hills highest inside

  • Horseshoe Hill410 ft
  • Iron Hill330 ft
  • Chestnut Hill300 ft
  • Drummond Hill290 ft
  • Sandy Brae170 ft
All 27 towns in New Castle County by typical elevation
  1. North Star330 ft
  2. Hockessin320 ft
  3. Arden280 ft
  4. Pike Creek250 ft
  5. Greenville250 ft
  6. Ardencroft230 ft
  7. Ardentown220 ft
  8. Pike Creek Valley210 ft
  9. Bellefonte170 ft
  10. Newark120 ft
  11. Claymont94 ft
  12. Wilmington94 ft
  13. Elsmere83 ft
  14. Brookside76 ft
  15. Glasgow75 ft
  16. Edgemoor73 ft
  17. Bear68 ft
  18. Townsend60 ft
  19. Middletown59 ft
  20. Wilmington Manor55 ft
  21. Odessa46 ft
  22. Newport46 ft
  23. St. Georges42 ft
  24. Smyrna partly35 ft
  25. New Castle13 ft
  26. Delaware City9 ft
  27. Port Penn5 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 39.4168° N, 75.5404° 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.