High Quality Content by WIKIPEDIA articles! Port of Spain, also written as Port-of-Spain, is the capital of the Republic of Trinidad and Tobago and the country`s third-largest municipality, after San Fernando and Chaguanas. The city has a municipal population of 49,031 (2000 census), a metropolitan population of 128,026 (1990 unofficial estimate) and a transient daily population of 250,000. It is located on the Gulf of Paria, on the northwest coast of the island of Trinidad and is part of a larger conurbation stretching from Chaguanas in the west to Arima in the east with an estimated population of 600,000.