The Santos trolleybus system forms part of the public transport network in Santos, a municipality in the state of São Paulo, Brazil. Opened on 12 August 1963, it presently comprises only one line, and, along with the two São Paulo metropolitan area trolleybus systems, is one of only three trolleybus systems still operating in Brazil.

Santos, officially Municipality of Estancia Balneária de Santos is a municipality in the Brazilian state of São Paulo, founded in 1546 by the Portuguese nobleman Brás Cubas. It is located mostly on the island of São Vicente, which harbors both the city of Santos and the city of São Vicente, and partially on the mainland. It is the main city in the metropolitan region of Baixada Santista. The population is 433,656 in an area of 280.67 km2 (108.37 sq mi). The city is home to the Coffee Museum, where world coffee prices were once negotiated. There is also a football memorial, dedicated to the city's greatest players, which includes Pelé, who spent the majority of his career with Santos Futebol Clube. Its beachfront garden, 5,335 m (5,834 yd) in length, figures in Guinness World Records as the largest beachfront garden in the world.