The influence of the kind of A-site cation in A(1-x)Sr(x)MnO(3) perovskites (A = La, Pr. Nd. Di [didymium]) on the catalytic activity in the total oxidation of methane, chloromethane. dichloromethane, and trichloroethylene has been studied. In contrast to methane, the total oxidation of chlorinated hydrocarbons (CHC) is connected with a reversible catalyst deactivation and the formation of byproducts at low reaction temperatures. For the catalysts calcined at 600 and 800 degreesC, resp.. the catalytic activity is determined mainly by specific surface area. amount of oxide admixtures and crystallinity of the perovskite. DiMnO(3) showed the highest and PrMnO3 catalysts the lowest catalytic activity in the total oxidation of methane and CHC. Partial substitution of A by Sr leads to an enhancement of the catalytic activity in the total oxidation of methane. but not in the total oxidation of CHC.