|Coordinates: Coordinates: |
|County||Contra Costa County|
|Elevation||203 ft (62 m)|
Oleum was an unincorporated community in Contra Costa County, California, United States, located between the unincorporated town of Rodeo and Tormey. It was a small company town, with housing for Union Oil company workers, hence the name, derived from "petroleum". The refinery still exists. The site is located on the Mexican land grant Rancho El Pinole made to Ygnacio Martinez. A post office operated at Oleum from 1910 to 1951.
- "Oleum (Contra Costa County, California)". Geographic Names Information System. United States Geological Survey. Retrieved May 11, 2014.
"FIPS55 Data: California". FIPS55 Data. United States Geological Survey. February 23, 2006. Archived from the original on June 18, 2006. Retrieved May 11, 2014. External link in
|This Contra Costa County, California–related article is a stub. You can help Wikipedia by expanding it.|