A pushbutton switch assembly includes a molded housing body with an integral central barrel, a pushbutton mounted in the housing body and having a stem plunger received in and longitudinally movable in the barrel with the operation of the pushbutton and a return spring for returning the pushbutton to a normal position when it is depressed and released. The central barrel and plunger are of a matching non-round shape thereby preventing rotation of the button in relation to the housing.