Central Bureau of Statistics has released the preliminary result of the National Population Census 2011 on September 27, 2011 in a program held in Lalitpur. According to preliminary result of the National Population Census 2011 released by CBS among the higher government official s, development partners and media, the population of Nepal reached 26,620,809 in the year 2011 which shows an increase of population at the rate of 1.4 percent per annum. According to the National Population Census 2001, the population growth rate of Nepal was 2.25 percent per annum. Likewise, the result shows that there are 5,659,984 households living in 4,767,196 dwellings/houses throughout the country which shows the ratio of houses to households 1:1.19. Furthermore, the result also revealed that the size of the household in Nepal has decreased from 5.44 in 2001 to 4.7 in 2011. Kathmandu district has the lowest household size of 3.71 whereas in some Terai districts such as Rautahat, Bara, Kapilbastu, the household size remains still more than 6. 
The preliminary result shows that the absentee population in Nepal increased to 1,917,903 which is more than double the absentee population in 2001. Apparently, the population of male absentee dominates in the total absentee population. The male absentee population comprises about 87 percent.  The percentage of male and female absentee population in the year 2001 was 89 and  11 percent respectively. The highest proportion of absentee population is from Kathmandu followed by Jhapa, Marang, Rupandehi and Kailali.
The preliminary result reveals that the population of male and female in Nepal is 12,927,431 and 13,693,378 respectively. Accordingly, the result shows that the sex ratio of Nepal has decreased from 99.8 in 2001 to 94.41 in 2011 which supports the scenario revealed in the proportion of absentee population (more male are leaving the country than female). 
According to the preliminary result, the Terai belt constitutes highest proportion of the population followed by Hill and Mountain belt. More than half of the total population of the country(50.2%) lives in Terai belt followed by Hill and Mountain belt that constitutes about 43 percent and 7 percent of the total population respectively.  Also, the result reveals the massive increase in the urban population. The urban population of Nepal constitutes about 17 percent of the total population in 2011 compared to 14 percent urban population in 2001. Likewise the rural population of Nepal decreased from 86 percent in 2001 to 83 percent in 2011. The sex ratio in the rural areas, as in the census 2001 is higher (104) than in the urban areas (92).  Among the urban areas, the Kathmandu Metropolitan City constitutes the largest population of 1,006,656 followed by Pokhara, Lalitpur and Biratnagar Municipality. Dhulikhel Municipality has the lowest population, 16,406, among the urban areas followed by Dasharathchand, Bhadrapur and Ilam Municipalities.
The result also reveals that Kathmandu district has the largest population of 1,740,977 followed by Morang, Rupandehi, Jhapa and Kailali which has the population of 964,709; 886,706; 810,636 and 770,279 respectively. Manang constitutes the lowest population of 6527 followed by Mustang, Dolpa, Rasuwa and Humla that has population of 13,799; 36701; 43798 and 51008 respectively.
Please click below for the details of the preliminary report.

1.Preliminary Report of the National Population Census 2011.

2.Preliminary Leaflet 2011.