The population of El Salvador in 2003 was estimated by the United Nations at 6,515,000, which placed it as number 97 in population among the 193 nations of the world. In that year approximately 5% of the population was over 65 years of age, with another 36% 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 1.55%, with the projected population for the year 2015 at 7,560,000. The population density in 2002 was 311 per sq km (806 per sq mi) which makes it the most densely populated country in Central America. Overpopulation is considered a major problem in El Salvador. The majority of the population live in the central plateau.
It was estimated by the Population Reference Bureau that 47% of the population lived in urban areas in 2001. The capital city, San Salvador, had a population of 1,368,000 in that year. Other major cities are Santa Ana (202,337) and San Miguel (182,817). According to the United Nations, the population growth rate in urban areas was 2.7% for 2000–2005.