Sonoma County, CA Elevation & Topographic Map
Elevation
4,730 ft 1,445 m3,550 ft 1,080 m2,960 ft 900 m1,770 ft 540 m590 ft 180 m0 ft 0 m
Zoom in for contour lines
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
Sonoma County averages about 730 ft (220 m) above sea level across all its land. Its ground runs from sea level on the Petaluma River to 4,730 ft on Cobb Mountain.
Average elevation
730 ft 220 m
all land inside the county
Highest
4,730 ft 1,440 m
on Cobb Mountain
Lowest
0 ft 0 m
at sea level on the Petaluma River
Sonoma County spans about 4,730 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 | 730 ft220 m |
| Highest point Inside the county, on Cobb Mountain (3DEP terrain model; no NGS survey height) | 4,730 ft1,440 m |
| Lowest point Where the land meets the Petaluma River | 0 ft0 m |
Elevation profile, south to north
38 mi south to north through Santa Rosa.
Topographic Map
- Location
- County in California, United States
- Population
- 485,375 2024 est.
- Land area
- 1,575.3 sq mi + 192.0 sq mi water
- Density
- 308 per sq mi
- Time zone
- Pacific UTC−8 / −7
- Landform region
- Pacific Border
- 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
- Lake County2,410 ft
- Mendocino County1,790 ft
- Napa County960 ft
- Sonoma County730 ft
- Marin County430 ft
- Solano County180 ft
Rankings by average elevation
- Counties in California44th highest of 57
- Counties in the United States1,974th highest of 3,151
Peaks and hills highest inside
- Geyser Peak3,463 ft
- Castle Rock, Sonoma County3,340 ft
- Bald Mountain2,730 ft
- Lookout Rock2,550 ft
- Mohrhardt Ridge2,320 ft
All 38 towns in Sonoma County by typical elevation
- Occidental630 ft
- Timber Cove620 ft
- Cazadero550 ft
- Kenwood420 ft
- Bodega360 ft
- Cloverdale350 ft
- Glen Ellen310 ft
- Forestville230 ft
- Geyserville230 ft
- Eldridge180 ft
- Bloomfield180 ft
- Bodega Bay180 ft
- Sebastopol170 ft
- Graton160 ft
- Sonoma State University150 ft
- Larkfield-Wikiup150 ft
- Carmet150 ft
- Santa Rosa150 ft
- Healdsburg150 ft
- Fetters Hot Springs-Agua Caliente140 ft
- Fulton140 ft
- Sea Ranch130 ft
- Guerneville130 ft
- Windsor130 ft
- Sereno del Mar130 ft
- Penngrove120 ft
- Boyes Hot Springs120 ft
- Petaluma Center110 ft
- Cotati110 ft
- Rohnert Park110 ft
- Jenner110 ft
- Temelec100 ft
- El Verano100 ft
- Valley Ford94 ft
- Sonoma77 ft
- Monte Rio70 ft
- Salmon Creek66 ft
- Petaluma45 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 2 arc-second (≈200 ft, 62 m) grid, coarsened from 1 arc-second so the whole area fits one run. Land means the boundary minus Census area water (on this grid, water areas of at least half a cell).
- Highest and lowest: the highest land cell, re-read at 1 arc-second around the 25 highest grid cells; 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, re-read at 1 arc-second around the 25 lowest grid cells; 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, −8 ft at 38.1490° N, 122.4310° 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.