| Official Name: | Mark West, California |
| Pushpin Map: | California |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location within the state of California |
| Subdivision Type: | Country |
| Subdivision Name: | United States |
| Subdivision Type1: | State |
| Subdivision Name1: | California |
| Subdivision Type2: | County |
| Subdivision Name2: | Sonoma |
| Timezone: | PST |
| Utc Offset: | -8 |
| Timezone Dst: | PDT |
| Utc Offset Dst: | -7 |
| Coordinates: | 38.5094°N -122.7822°W |
| Elevation M: | 128 |
| Elevation Ft: | 420 |
| Postal Code Type: | ZIP code |
| Postal Code: | 95492 |
| Area Code: | 707 |
| Blank Name: | FIPS code |
| Blank1 Name: | GNIS feature ID |
| Blank1 Info: | 228117 |
Mark West is an unincorporated community immediately north of Santa Rosa, California in Sonoma County, California, United States. Mark West is located along Mark West Springs Road adjacent to U.S. Highway 101. The community of Mark West is named for Scottish American pioneer William Marcus West.[1]
After the San Francisco and North Pacific Railroad was extended to Cloverdale in the 1870s, its trains stopped in Mark West.[2]