|— Unincorporated community —|
|County||Contra Costa County|
|Elevation1||10 ft (3 m)|
Monsanto is an unincorporated community in Contra Costa County, California. It is located on the Atchison, Topeka and Santa Fe Railroad 4.5 miles (7.2 km) east of Martinez,2 at an elevation of 10 feet (3 m).
- U.S. Geological Survey Geographic Names Information System: Monsanto, California
- Durham, David L. (1998). California's Geographic Names: A Gazetteer of Historic and Modern Names of the State. Quill Driver Books. p. 666. ISBN 9781884995149.
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