Jamapa is a small municipality of the coastal state of Veracruz in Mexico, with an area of 163.8 km2, a figure that represents 0.22% of the total of the state and is located in the central zone, at coordinates 19º03' of latitude north and 96º14' of west longitude. Located in the foothills of the leeward plains, at an altitude of 10 meters above sea level, it borders on the northwest with the municipality of Manlio Fabio Altamirano. To the northeast with Medellín. To the south with Tlalixcoyan and Cotaxtla. And to the west with Soledad de Doblado.
Its approximate distance to the southeast of the state capital by road is 100 km, and the approximate distance from the port of Veracruz by road is 15 km. It is part of the Metropolitan Zone of Veracruz, its climate is warm-dry-regular, with an average annual temperature of 25.5ºc. Heavy rains in June and early September. Its average annual rainfall is 1,108 millimeters. Its name derives from Nahuatl: Xam-a-pan,"In the river of adobes".