 It has an area of and had a population of 18,696 inhabitants as of 2005.The municipality is named in honor of Álvaro Obregón, the President of Mexico from 1920 to 1924.The municipality contains 35 localities, which include Álvaro Obregón, Tzintzimeo, El Calvario, Felipe Carrillo Puerto, and Lázaro Cárdenas.