The population of Slovakia in 2003 was estimated by the United Nations at 5,402,000, which placed it as number 106 in population among the 193 nations of the world. In that year approximately 11% of the population was over 65 years of age, with another 19% of the population under 15 years of age. There were 94 males for every 100 females in the country in 2003. According to the UN, the annual population growth rate for 2000–2005 is 0.08%, with the projected population for the year 2015 at 5,441,000. The population density in 2002 was 110 per sq km (286 per sq mi). The population is most dense in the river valleys.
It was estimated by the Population Reference Bureau that 57% of the population lived in urban areas in 2001. The capital city, Bratislava, had a population of 460,000 in that year. Košice had a population of 235,160. According to the United Nations, the urban population growth rate for 2000–2005 was 0.5%.