EXHIBIT 21


                       SUBSIDIARIES OF UNOCAL CORPORATION




 
 
 
                                        
                                            Organized
                                              under
Name of Company                              law of
- ---------------                             ---------
 
 
Union Oil Company of California, dba       California
 "UNOCAL"
 
 Philippine Geothermal, Incorporated       California
 
 Unocal International Corporation          Nevada
 
   Unocal Canada Limited                   Alberta
 
   Unocal Indonesia, Limited               Bermuda
 
   Unocal Netherlands B.V.                 Netherlands
 
   Unocal Thailand, Limited                Bermuda
 

  The indented companies are subsidiaries of Union Oil Company of California.
The names of 147 subsidiaries are omitted inasmuch as such subsidiaries,
considered in the aggregate as a single subsidiary, would not constitute a
significant subsidiary.