The population of Thailand in 2003 was estimated by the United Nations at 62,833,000, which placed it as number 19 in population among the 193 nations of the world. In that year approximately 6% of the population was over 65 years of age, with another 24% of the population under 15 years of age. There were 96 males for every 100 females in the country in 2003. According to the UN, the annual population growth rate for 2000–2005 is 1.01%, with the projected population for the year 2015 at 69,585,000. The population density in 2002 was 122 per sq km (316 per sq mi), but there are great regional variations in density.
It was estimated by the Population Reference Bureau that 22% of the population lived in urban areas in 2001. The capital city and only major urban area, Bangkok, had a population of 7,133,000 in that year. Outside of Bangkok, most major cities are provincial capitals, each generally centered in a changwat (province or county) with the same name as the city. According to the United Nations, the urban population growth rate for 2000– 2005 was 2.7%.