According to Ministry of Federal Affairs and Local Development Silichong has an area of 293.26 square kilometres (113.23 sq mi) and the total population of the municipality is 12174 as of Census of Nepal 2011.
[1] Sisuwakhola, Bala, Tamku, Mantewa and part of Yafu which previously were all separate Village development committee merged to form this new local level body.
[1] At the time of the 2011 Nepal census, Silichong Rural Municipality had a population of 11,812.
Of these, 65.2% spoke Kulung, 16.0% Mewahang, 6.3% Nepali, 2.7% Rai, 1.9% Tamang, 1.6% Nachhiring, 1.5% Sherpa, 1.3% Maithili, 1.3% Sindhi, 0.7% Thulung, 0.3% Khaling, 0.3% Sampang, 0.2% Chamling, 0.2% Limbu, 0.1% Bantawa, 0.1% Dumi and 0.2% other languages as their first language.
[2] In terms of ethnicity/caste, 66.3% were Kulung, 13.7% Mewahang Bala, 6.6% Rai, 2.4% Kami, 2.2% Bhote, 1.9% Chhetri, 1.9% Tamang, 1.5% Sherpa, 1.3% Nachhiring, 1.1% Kayastha, 0.7% Thulung, 0.5% Khaling, 0.3% Damai/Dholi, 0.3% Samgpang, 0.2% Chamling, 0.2% Limbu, 0.1% Hill Brahmin, 0.1% Newar, 0.1% Sanyasi/Dasnami, and 0.4% others.