Pichilemu, along with the communes of Placilla, Nancagua, Chépica, Santa Cruz, Pumanque, Palmilla, Peralillo, Navidad, Lolol, Litueche, La Estrella, Chile, Marchihue and Paredones, is part of the Electoral District N° 35 and belongs to the 9th Senatorial Constituency (O'Higgins) of the electoral division of Chile.