In 1831 the village of San Juan of the Rio constituted a municipality. Into Decree of November 5, 1932 the municipality of San Juan of the Rio and the head-board they change its name to that of Rafael Delgado, in honor of the notable writer native of Cordoba.
Geographic Limits 
The municipality of Rafael Delgado is delimited to the north by Orizaba and Ixmatlahuacan to the east by Ixtaczoquitlán, to the south by San Andrés Tenejapan, Tlilapan and Nogales and to the west by Río Blanco. It is watered by the Río Blanco river.
In Rafael Delgado , in June takes place the celebration in honor to San Juan de la Concepción, Patron of the town, and in December takes place the celebration in honor to Virgen de Guadalupe.
The weather in Rafael Delgado is cold and wet all year with rains in summer and autumn.
- "Enciclopedia de los Municipios de México: Rafael Delgado" (in Spanish). Gobierno Estatal. Retrieved 2009-06-12.