Efrén Pérez Rivera (March 10, 1929 – May 15, 2011) was a Puerto Rican environmentalist leader and college professor. He got married at the age of 28 with Pezinka Berenguer, till the day he died. He had three children with her, Efrén Pérez Berenguer, Manuel Pérez Berenguer, and José Luis Pérez Berenguer