The population of Trinidad and Tobago in 2003 was estimated by the United Nations at 1,303,000, which placed it as number 148 in population among the 193 nations of the world. In that year approximately 7% of the population was over 65 years of age, with another 26% of the population under 15 years of age. There were 98 males for every 100 females in the country in 2003. According to the UN, the annual population growth rate for 2000–2005 is 0.34%, with the projected population for the year 2015 at 1,342,000. The population density in 2002 was 254 per sq km (659 per sq mi). The majority of the population resides on Trinidad.
It was estimated by the Population Reference Bureau that 74% of the population lived in urban areas in 2001. The capital city, Port-of-Spain, had a population of 53,000 in that year. The second most important town is San Fernando, with a population of 33,600. An almost continuous urban area extends from Port-of-Spain eastward to Tunapuna, westward, and northward into the Northern Range. About one-third of the population lives in Port-of-Spain or its suburbs or within 16 km (10 mi) of them. The remainder of Trinidad and virtually all of Tobago are sparsely settled. Scarborough, the main town of Tobago, has a population of approximately 4,000. According to the UN, the urban population growth rate for 2000–2005 was 1.1%.