Namchi district lies at an altitude of 400 to 2000 metres and has a temperate climate for most of the year.

South Sikkim is the most industrialised district in the state, owing to the availability of flat land.

Since the geology is stable the roads are in good condition as compared to other parts of the state which suffer from landslides.

According to the 2011 census, Namchi district has a population of 146,850,[3] roughly equal to the nation of Saint Lucia.

[5] Languages of Namchi district (2011) At the time of the 2011 Census of India, 72.66% of the population in the district spoke Nepali, 3.88% Sikkimese, 3.61% Lepcha, 3.57% Limbu, 3.25% Hindi, 3.19% Sherpa, 2.46% Tamang, 1.65% Rai, 1.26% Bhojpuri, 0.88% Tibetan and 0.83% Bengali as their first language.