Fairfax County, VA Elevation & Topographic Map
Elevation
560 ft 170 m420 ft 130 m350 ft 105 m210 ft 65 m70 ft 21 m0 ft 0 m
Contours every 500 ft, bold every 2,500 ft
USGS 3DEP · U.S. Census Bureau
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
Fairfax County averages about 270 ft (85 m) above sea level across all its land. Its ground runs from sea level on Accotink Bay to 560 ft on the west side.
Average elevation
270 ft 85 m
all land inside the county
Highest
560 ft 170 m
on the west side
Lowest
0 ft 0 m
at sea level on Accotink Bay
Fairfax 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.
| Figure | Elevation |
|---|---|
| Average of all land | 270 ft85 m |
| Highest point Inside the county, on the west side | 560 ft170 m |
| Lowest point Where the land meets Accotink Bay | 0 ft0 m |
Elevation profile, west to east
22 mi west to east through Centreville.
Topographic Map
- Location
- County in Virginia, United States
- Population
- 1,160,925 2024 est.
- Land area
- 391.0 sq mi + 15.4 sq mi water
- Density
- 2,969 per sq mi
- Time zone
- Eastern UTC−5 / −4
- Landform regions
- Piedmont 90%, Coastal Plain 10%
- Drains to
- Atlantic Ocean
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Sources: U.S. Census Bureau, USGS
Nearby Places
Neighboring counties sharing a border, by average
- Loudoun County470 ft
- Montgomery County, MD410 ft
- Fairfax city390 ft
- Falls Church city330 ft
- Fairfax County270 ft
- Prince William County270 ft
- Arlington County200 ft
- Prince George's County, MD150 ft
- Alexandria city120 ft
- Charles County, MD110 ft
Rankings by average elevation
- Counties in Virginia64th highest of 94
- Counties in the United States2,664th highest of 3,151
Peaks and hills highest inside
- Gantt Hill520 ft
- Freedom Hill490 ft
- Mount Daniel470 ft
- Prout Hill450 ft
- Prospect Hill, Fairfax County386 ft
All 69 towns in Fairfax County by typical elevation
- Fair Oaks440 ft
- Dunn Loring420 ft
- Tysons420 ft
- Fair Lakes410 ft
- Braddock410 ft
- Idylwood410 ft
- George Mason410 ft
- Navy400 ft
- Vienna390 ft
- Herndon390 ft
- Reston380 ft
- Difficult Run380 ft
- Hutchison380 ft
- Long Branch380 ft
- Oakton370 ft
- Greenbriar370 ft
- Franklin Farm370 ft
- Burke Centre370 ft
- Union Mill370 ft
- Kings Park West370 ft
- Fairfax Station370 ft
- Pimmit Hills360 ft
- Floris360 ft
- Great Falls Crossing360 ft
- Sully Square350 ft
- Merrifield350 ft
- McNair350 ft
- Mantua340 ft
- Woodburn330 ft
- Great Falls330 ft
- Chantilly330 ft
- Wolf Trap320 ft
- Dranesville320 ft
- Seven Corners320 ft
- West Falls Church310 ft
- Burke310 ft
- Annandale310 ft
- South Run300 ft
- McLean300 ft
- Wakefield300 ft
- Kings Park300 ft
- Crosspointe290 ft
- Lake Barcroft290 ft
- Centreville290 ft
- West Springfield280 ft
- North Springfield270 ft
- Bull Run, Fairfax County260 ft
- Clifton260 ft
- Ravensworth250 ft
- Bailey's Crossroads250 ft
- Newington Forest250 ft
- Springfield240 ft
- Lincolnia240 ft
- Franconia220 ft
- Kingstowne200 ft
- Rose Hill190 ft
- Laurel Hill180 ft
- Newington180 ft
- Groveton150 ft
- Lorton120 ft
- Fort Belvoir120 ft
- Huntington77 ft
- Belle Haven76 ft
- Hayfield62 ft
- Mount Vernon40 ft
- Fort Hunt39 ft
- Hybla Valley36 ft
- Woodlawn34 ft
- Mason Neck33 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, −190 ft at 38.6979° N, 77.2707° 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.