Contra Costa County, CA Elevation & Topographic Map
Elevation
3,860 ft 1,180 m2,890 ft 880 m2,410 ft 735 m1,440 ft 440 m460 ft 140 m−21 ft −6 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
Contra Costa County averages about 500 ft (150 m) above sea level across all its land. Its ground runs from 21 ft below sea level on the northeast side to 3,864 ft on Mount Diablo.
Average elevation
500 ft 150 m
all land inside the county
Highest
3,864 ft 1,178 m
on Mount Diablo
Lowest
−21 ft −6 m
on the northeast side
Contra Costa County spans about 3,881 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 | 500 ft150 m |
| Highest point Inside the county, on Mount Diablo (NGS survey height) | 3,864 ft1,178 m |
| Lowest point Inside the county, on the northeast side | −21 ft−6 m |
Elevation profile, south to north
19 mi south to north through Concord.
Topographic Map
- Location
- County in California, United States
- Population
- 1,172,607 2024 est.
- Land area
- 716.9 sq mi + 87.0 sq mi water
- Density
- 1,636 per sq mi
- Time zone
- Pacific UTC−8 / −7
- Landform region
- Pacific Border 99%
- Drains to
- Pacific Ocean
⤓ Download this map
WebP, 1200 × 900. Free to use: credit “ElevationOf.com” with a link to this page.
Sources: U.S. Census Bureau, USGS
Nearby Places
Neighboring counties sharing a border, by average
- Alameda County840 ft
- Contra Costa County500 ft
- Marin County430 ft
- Solano County180 ft
- San Francisco County180 ft
- San Joaquin County170 ft
- Sacramento County98 ft
Rankings by average elevation
- Counties in California48th highest of 57
- Counties in the United States2,332nd highest of 3,151
Peaks and hills highest inside
- Mount Diablo3,864 ft
- North Peak, Contra Costa County3,530 ft
- Eagle Peak, Contra Costa County2,370 ft
- Rocky Ridge2,020 ft
- Vollmer Peak1,916 ft
All 53 towns in Contra Costa County by typical elevation
- Norris Canyon1,270 ft
- Blackhawk900 ft
- Camino Tassajara740 ft
- Orinda720 ft
- Moraga680 ft
- Diablo600 ft
- Kensington600 ft
- San Ramon550 ft
- Danville490 ft
- Clayton490 ft
- Lafayette450 ft
- Alamo430 ft
- Acalanes Ridge410 ft
- East Richmond Heights330 ft
- Castle Hill300 ft
- Reliez Valley290 ft
- North Gate270 ft
- San Miguel250 ft
- Alhambra Valley250 ft
- El Sobrante240 ft
- Shell Ridge230 ft
- Saranap200 ft
- Walnut Creek170 ft
- Hercules160 ft
- Crockett160 ft
- Martinez160 ft
- Pinole140 ft
- Antioch140 ft
- Port Costa110 ft
- El Cerrito110 ft
- Tara Hills98 ft
- Pittsburg97 ft
- Concord96 ft
- Mountain View, Contra Costa County89 ft
- Contra Costa Centre88 ft
- Brentwood88 ft
- Rollingwood78 ft
- Bay Point72 ft
- Pleasant Hill72 ft
- Rodeo70 ft
- Richmond54 ft
- Montalvin Manor53 ft
- Bayview, Contra Costa County47 ft
- San Pablo47 ft
- Clyde46 ft
- Vine Hill41 ft
- Byron34 ft
- Oakley32 ft
- Pacheco27 ft
- Knightsen24 ft
- North Richmond14 ft
- Discovery Bay12 ft
- Bethel Island−4 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; it is a named summit, so its height is the peak method: the 3DEP top on a ~7 ft (2 m) window, or the NGS published height when a survey mark sits within 160 ft (50 m) of it. Lowest: the lowest land cell; coastal ground within 3 ft (1 m) of named tidal water counts as sea level.
- 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.