Port of Spain had a local campus enrollment of 15,571 in academic year 2007/2008. The University of Trinidad and Tobago has several campuses and institutes in the greater Port of Spain area including the research based Natural Gas Institute of the Americas and the Chaguaramas Centre for Maritime Studies. Port of Spain has a population of 18,008 males and 19,066 females, with 5,694 businesses and is home to 12,333 households with an average size of 2.9 according to the 2011 census. The city experienced an average annual growth rate of −2.3% between the censuses of 2000 and 2011 Port of Spain's diverse population
Port of Spain public museum and headquarters for the National Heritage Trust and was sold to the Government in 1979; Roomor, an ornate black-and-white château-like building that remains a private residence; and Stollmeyer's Castle, a turreted house supposedly modelled on Balmoral Castle. The slow pace of building restorations over the years remains a concern. Housing in Port of Spain ranges from luxurious waterfront apartments to board houses lacking indoor plumbing and motor vehicular access. Continued pressure for expansion of commercial development in Woodbrook and uptown POS (Port of Spain proper) has led to a rapid rate of decline in the city's population over