Oleum, California

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Coordinates: 38°02′41″N 122°14′54″W / 38.04472°N 122.24833°W / 38.04472; -122.24833

Unincorporated community
Oleum is located in California
Location in California
Coordinates: 38°02′41″N 122°14′54″W / 38.04472°N 122.24833°W / 38.04472; -122.24833
Country United States
State California
County Contra Costa County
Elevation1 203 ft (62 m)

Oleum is an unincorporated community in Contra Costa County, California. It is located on the Southern Pacific Railroad 6 miles (10 km) east-southeast of Point Pinole,2 at an elevation of 203 feet (62 m). An oil refinery is located at Oleum, hence the name from "petroleum".2

Oleum is located on the Mexican land grant Rancho El Pinole made to Ygnacio Martinez. A post office operated at Oleum from 1910 to 1951.2


  1. ^ U.S. Geological Survey Geographic Names Information System: Oleum, California
  2. ^ a b c Durham, David L. (1998). California's Geographic Names: A Gazetteer of Historic and Modern Names of the State. Quill Driver Books. p. 675. ISBN 9781884995149. 

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