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 Chaguaramas in the west to Arima in the east with an estimated population of 600,000.

Port of Spain is Trinidad and Tobago's most developed city. The city serves primarily as a retail and administrative centre and it has been the capital of the island since 1757. It is also an important financial services centre for the Caribbean and is home to two of the largest banks in the region.

The city is also home to the largest container port on the island and is one of several shipping hubs of the Caribbean, exporting both agricultural products and manufactured goods. Bauxite from the Guyanas and iron ore from Venezuela are trans-shipped via facilities at Chaguaramas, about five miles (8 km) west of the city. The pre-lenten Carnival is the city's main annual cultural festival and tourist attraction.