Buddhashanti, according to Ministry of Federal Affairs and Local Development has an area of 79.78 square kilometres (30.80 sq mi) and the total population of the municipality is 41,615 as of Census of Nepal 2011.

[1][2][3] Budhabare and Shantinagar which previously were all separate Village development committee merged to form this new local level body.

Of these, 72.9% spoke Nepali, 10.9% Limbu, 2.9% Rai, 2.3% Tamang, 1.8% Dhimal, 1.5% Magar, 1.3% Newar, 0.8% Maithili, 0.8% Tharu, 0.7% Rajbanshi, 0.4% Bantawa, 0.3% Bhojpuri, 0.3% Chamling, 0.3% Sherpa, 0.2% Danwar, 0.2% Gurung, 0.2% Kisan, 0.2% Kulung, 0.2% Lepcha, 0.2% Urdu, 0.1% Hindi, 0.1% Khaling, 0.1% Majhi, 0.1% Sunwar and 0.4% other languages as their first language.

[4] In terms of ethnicity/caste, 34.8% were Hill Brahmin, 13.1% Limbu, 11.4% Chhetri, 6.9% Rai, 6.2% Kami, 3.9% Newar, 3.7% Tamang, 3.3% Magar, 2.5% Damai/Dholi, 2.1% Dhimal, 1.1% Rajbanshi, 1.0% Tharu, 0.9% Gharti/Bhujel, 0.8% Sarki, 0.8% Sunuwar, 0.7% Gurung, 0.7% Kumal, 0.6% other Dalit, 0.6% Sanyasi/Dasnami, 0.5% Terai Brahmin, 0.4% Musalman, 0.4% Sherpa, 0.3% Danuwar, 0.3% Teli, 0.2% Kisan, 0.2% Kulung, 0.2% Lepcha, 0.2% Majhi, 0.2% Pattharkatta/Kushwadiya, 0.2% other Terai, 0.1% Bengali, 0.1% Chamling, 0.1% Hajjam/Thakur, 0.1% Halwai, 0.1% Khawas, 0.1% Musahar, 0.1% Yakkha and 0.9% others.

[5] In terms of religion, 75.8% were Hindu, 13.8% Kirati, 6.1% Buddhist, 2.5% Christian, 0.6% Prakriti, 0.5% Muslim and 0.7% others.