According to Ministry of Federal Affairs and Local Development Chalachuli has an area of 108.46 square kilometres (41.88 sq mi) and the total population of the municipality is 20820 as of Census of Nepal 2011.

To fulfil the requirements of a rural municipality an adjoining village development committee named Sakphara was added to it.

Of these, 44.5% spoke Nepali, 20.3% Limbu, 10.8% Bantawa, 7.8% Rai, 3.9% Tamang, 2.1% Chamling, 1.9% Kulung, 1.3% Magar, 0.9% Yakkha, 0.8% Sampang, 0.6% Thulung, 0.5% Newar, 0.3% Dhimal, 0.3% Dumi, 0.2% Gurung, 0.2% Khaling, 0.2% Koi, 0.2% Sunwar, 0.1% Bhujel, 0.1% Dungmali, 0.1% Maithili, 0.1% Majhi, 0.1% Nachhiring, 0.1% Sherpa and 2.5% other languages as their first language.

[3] In terms of ethnicity/caste, 26.4% were Limbu, 25.1% Rai, 13.3% Hill Brahmin, 8.9% Chhetri, 5.1% Kami, 4.8% Tamang, 3.9% Newar, 2.1% Magar, 1.7% Damai/Dholi, 1.5% Kumal, 1.0% Sanyasi/Dasnami, 0.9% Yakkha, 0.4% Bantawa, 0.4% Dhimal, 0.3% Gharti/Bhujel, 0.3% Gurung, 0.3% Samgpang, 0.3% Sunuwar, 0.2% Badi, 0.2% Majhi, 0.1% Chamling, 0.1% Musahar, 0.1% Sarki, 0.1% Sherpa and 0.5% others.

[6] Formally Chulachuli was a Village Development Committee in Ilam District in the Province No.