| Cowell | |
| Settlement Type: | Former unincorporated community District of Concord |
| Pushpin Map: | California |
| Pushpin Label Position: | bottom |
| Pushpin Map Caption: | Location in California |
| Subdivision Type: | Country |
| Subdivision Type1: | State |
| Subdivision Name1: | California |
| Subdivision Type2: | County |
| Subdivision Name2: | Contra Costa County |
| Subdivision Type3: | City |
| Subdivision Name3: | Concord |
| Coordinates: | 37.9528°N -121.9894°W |
| Elevation M: | 79 |
| Elevation Ft: | 259 |
Cowell is a former unincorporated community now annexed to Concord in Contra Costa County, California. It lies at an elevation of 259 feet (79 m).
Cowell was named for Joshua Cowell, local landowner. A post office operated at Cowell from 1922 to 1969. Cowell was a company town for Cowell Portland Cement. Other than a former firehouse, nothing remains of the former town, which was replaced by the Walnut Country subdivision, more commonly known as "The Crossings," during the 1970s. A looming, dormant 244-foot high smokestack remained as the most prominent reminder of Cowell until it was demolished in 2009.