Demographics of Nepal

Nepalese also referred to as Nepalis or Nepali people (Nepali: नेपाली गण) are the Indo-Aryan and Sino-Tibetan citizens of Nepal under the provisions of Nepali nationality law. The country is home to people of many different national origins. As a result, people of Nepal do not equate their nationality with ethnicity, but with citizenship and allegiance. Although citizens make up the majority of Nepalese, non-citizen residents, dual citizen, and expatriates may also claim a Nepalese identity. Nepalese are descendants of migrants from parts of India, Kashmir, Tibet, and parts of Burma and Yunnan, and much further traces origin to Central Asia, along with indigenous peoples. Nepal is a multicultural and multiethnic country. Kathmandu Valley, in the middle hill region, constitutes a small fraction of the nation's area but is the most densely populated, with almost 5 percent of the nation's population.

The population of Nepal is estimated to be 26,494,504 people based on the 2011 Nepal census, with a population growth rate of 1.35% and a median age of 21.6 years. Female median age is estimated to be 22.5 years, and male median age to be 20.7 years. Only 4.4% of the population is estimated to be more than 65 years old, comprising 681,252 females and 597,628 males. 61% of the population is between 15 and 64 years old, and 34.6% is younger than 14 years. Birth rate is estimated to be 22.17 births/1,000 population with an infant mortality rate of 44.54 deaths per 1000 live births. Life expectancy at birth is estimated to be 67.44 years for females and 64.94 years for males. The mortality rate is estimated to be 681 deaths per 100,000 people. Net migration rate is estimated to be 61 migrants per 100,000 people. According to the 2011 census, 65.9% of the total population is literate.

...
Wikipedia