Washington County, OR Elevation & Topographic Map

Topographic elevation map of Washington County, Oregon, shaded from 110 ft on the southeast side to 3,510 ft on the west side
Elevation
3,510 ft 1,070 m2,660 ft 810 m2,230 ft 680 m1,380 ft 420 m530 ft 160 m110 ft 30 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

Washington County averages about 750 ft (230 m) above sea level across all its land. Its ground runs from 110 ft on the southeast side to 3,510 ft on the west side.

Average elevation
750 ft 230 m
all land inside the county
Highest
3,510 ft 1,070 m
on the west side
Lowest
110 ft 30 m
on the southeast side

Washington County spans about 3,400 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 land750 ft230 m
Highest point
Inside the county, on the west side
3,510 ft1,070 m
Lowest point
Inside the county, on the southeast side
110 ft30 m

Elevation profile, west to east

32 mi west to east through Hillsboro.

Topographic Map

Topographic elevation map of Washington County, Oregon, shaded from 110 ft on the southeast side to 3,510 ft on the west side
County boundary (dashed) over shaded terrain, with contours every 200 ft (61 m).
Location
County in Oregon, United States
Population
611,272 2024 est.
Land area
724.3 sq mi + 2.4 sq mi water
Density
844 per sq mi
Time zone
Pacific UTC−8 / −7
Landform region
Pacific Border
Drains to
Pacific Ocean
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Sources: U.S. Census Bureau, USGS

Nearby Places

Neighboring counties sharing a border, by average

  1. Clackamas County2,150 ft
  2. Tillamook County1,110 ft
  3. Multnomah County1,010 ft
  4. Columbia County750 ft
  5. Washington County750 ft
  6. Yamhill County700 ft

Rankings by average elevation

  • Counties in Oregon34th highest of 36
  • Counties in the United States1,925th highest of 3,151

Peaks and hills highest inside

  • South Saddle Mountain3,465 ft
  • Larch Mountain, Washington County3,460 ft
  • Round Top, Washington County2,990 ft
  • Windy Point, Washington County2,910 ft
  • Green Mountain2,220 ft
All 31 towns in Washington County by typical elevation
  1. West Haven-Sylvan560 ft
  2. Cedar Mill420 ft
  3. Cherry Grove410 ft
  4. Bull Mountain380 ft
  5. Bethany300 ft
  6. West Slope290 ft
  7. Raleigh Hills280 ft
  8. Lake Oswego partly280 ft
  9. Garden Home-Whitford250 ft
  10. Oak Hills250 ft
  11. Cedar Hills240 ft
  12. Gaston240 ft
  13. Rockcreek230 ft
  14. Beaverton230 ft
  15. Marlene Village220 ft
  16. Metzger220 ft
  17. Tigard220 ft
  18. Portland partly210 ft
  19. Banks210 ft
  20. Sherwood210 ft
  21. Aloha200 ft
  22. Dilley200 ft
  23. Durham190 ft
  24. Wilsonville partly190 ft
  25. Tualatin190 ft
  26. Hillsboro190 ft
  27. North Plains190 ft
  28. Forest Grove180 ft
  29. Cornelius180 ft
  30. King City170 ft
  31. Rivergrove partly130 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, −63 ft at 45.3510° N, 122.8018° W, is in such a hollow or patch and is not counted.
  • 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.