The macroscopic performance of monometallic Group VIII metal catalysts and bimetallic Group VIII metal-containing catalysts for dehalogenation reactions and the mechanistic aspects of the reactions are reviewed. Of primary importance is the dechlorination of multiply chlorinated C 2 -C 3 hydrocarbons containing Cl atoms attached to adjacent carbons. The chemistry of geminal chloro- and chlorofluorocarbons (CFCs) dehalogenation catalyzed by supported noble metal-containing catalysts in the presence of H 2 is also reviewed. The hydrodehalogenative oligomerization of C 1 chloro and chlorofluorocarbons is considered with the greatest detailed; however, the hydrodechlorination chemistry is also addressed.