Port of Spain, officially the City of Port of Spain, is the capital of Trinidad and Tobago and the third largest municipality, after Chaguanas and San Fernando. The city has a municipal population of 37,074 (2011), an urban population of 81,142 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 Chaguaramas in the west to Arima in the east with an estimated population of 600,000.

Trinidad and Tobago, officially the Republic of Trinidad and Tobago, is the southernmost island country in the Caribbean. Consisting of the main islands Trinidad and Tobago and numerous much smaller islands, it is situated 11 kilometres off the coast of northeastern Venezuela and 130 kilometres south of Grenada. It shares maritime boundaries with Barbados to the east, Grenada to the northwest and Venezuela to the south and west. Trinidad and Tobago is generally considered to be part of the West Indies. The island country's capital is Port of Spain, while its largest and most populous municipality is Chaguanas.