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
Elevation[1] 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.