Sibinal is a municipality in the San Marcos department of Guatemala. Its name comes from mam tziben (English: "Writing" and nal, meaning "Bernard writings" It was founded in February 1799. It is a mountainous municipality at an altitude about 2500 m near the Mexican-Guatemalan border. The village of Sibinal is one of the points for climbing towards the Volcano Tacaná.

San Marcos is a department in northwestern Guatemala, on the Pacific Ocean and along the western Guatemala-Mexico border.