San Sebastián de la Gomera is a town (the main port and capital) and a municipality on La Gomera in the Canary Islands, Spain. The population is 8,699 (2013) and the area is 113.59 km².

The port serves ferry routes to the islands of Tenerife, La Palma and El Hierro. Streets include Calle Real and F. Olsen. A bus station named Estación de Guaguas is used for bus lines throughout the island; it is located on Avenida Quinta Centenario.