Union County, NJ Elevation & Topographic Map

Topographic elevation map of Union County, New Jersey, shaded from sea level on Newark Bay to 560 ft on the west side
Elevation
560 ft 170 m420 ft 130 m350 ft 105 m210 ft 65 m70 ft 21 m0 ft 0 m
Contours every 200 ft, bold every 1,000 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

Union County averages about 120 ft (40 m) above sea level across all its land. Its ground runs from sea level on Newark Bay to 560 ft on the west side.

Average elevation
120 ft 40 m
all land inside the county
Highest
560 ft 170 m
on the west side
Lowest
0 ft 0 m
at sea level on Newark Bay

Union County spans about 560 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 land120 ft40 m
Highest point
Inside the county, on the west side
560 ft170 m
Lowest point
Where the land meets Newark Bay
0 ft0 m

Elevation profile, west to east

16 mi west to east through Elizabeth.

Topographic Map

Topographic elevation map of Union County, New Jersey, shaded from sea level on Newark Bay to 560 ft on the west side
County boundary (dashed) over shaded terrain, with contours every 40 ft (12 m).
Location
County in New Jersey, United States
Population
594,160 2024 est.
Land area
102.8 sq mi + 2.6 sq mi water
Density
5,782 per sq mi
Time zone
Eastern UTC−5 / −4
Landform region
Piedmont
Drains to
Atlantic Ocean
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Sources: U.S. Census Bureau, USGS

Nearby Places

Neighboring counties sharing a border, by average

  1. Morris County640 ft
  2. Essex County240 ft
  3. Somerset County200 ft
  4. Union County120 ft
  5. Middlesex County81 ft
  6. Richmond County, NY70 ft
  7. Hudson County41 ft

Rankings by average elevation

All 27 towns in Union County by typical elevation
  1. Summit360 ft
  2. Berkeley Heights Township280 ft
  3. New Providence250 ft
  4. Mountainside190 ft
  5. Vauxhall160 ft
  6. Fanwood160 ft
  7. Scotch Plains Township150 ft
  8. Union120 ft
  9. Westfield120 ft
  10. Connecticut Farms110 ft
  11. Springfield Township110 ft
  12. Union Township97 ft
  13. Plainfield96 ft
  14. Springfield93 ft
  15. Garwood87 ft
  16. Kenilworth86 ft
  17. Roselle Park77 ft
  18. Cranford Township73 ft
  19. Cranford68 ft
  20. Winfield Township63 ft
  21. Clark Township60 ft
  22. Roselle57 ft
  23. Hillside Township53 ft
  24. Kean University43 ft
  25. Linden31 ft
  26. Elizabeth30 ft
  27. Rahway23 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 40.6493° N, 74.1779° 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.