San Pablo Guelatao is a town and the seat of the Municipality of Guelatao de Juárez, in the Mexican state of Oaxaca. It is part of the Ixtlán District in the Sierra Norte de Oaxaca region.

Ulises Ernesto Ruiz Ortiz is a Mexican politician and former governor of the State of Oaxaca. He took office in 2004 as a member of the Institutional Revolutionary Party.