Tikal Temple I is the designation given to one of the major structures at Tikal, one of the largest cities and archaeological sites of the pre-Columbian Maya civilization in Mesoamerica. It is located in the Petén Basin region of northern Guatemala. It also is known as the Temple of the Great Jaguar because of a lintel that represents a king sitting upon a jaguar throne. An alternative name is the Temple of Ah Cacao, after the ruler buried in the temple. Temple I is a typically Petén-styled limestone stepped pyramid structure that is dated to approximately 732 AD.

Situated at the heart of a World Heritage Site, the temple is surmounted by a characteristic roof comb, a distinctive Maya architectural feature. Building Temple I on the eastern side of the Great Plaza was a significant deviation from the established tradition of building funerary temples just north of the plaza in Tikal's North Acropolis.