Bilbao is a Mesoamerican archaeological site about 1 mile (1.6 km) from the modern town of Santa Lucía Cotzumalguapa in the Escuintla department of Guatemala. The site lies among sugar plantations on the Pacific coastal plain and its principal phase of occupation is dated to the Classic Period. Bilbao was a major centre belonging to the Cotzumalhuapa culture with its main occupation dating to the Late Classic. Bilbao is the former name of the plantation on which the site lies and from which it has derived its name.

Santa Lucía Cotzumalguapa is a town, with a population of 58,877, and a municipality in the Escuintla department of Guatemala.