Mahabu (Nepali: महाबु) is a rural municipality located in Dailekh District of Karnali Province of Nepal.

[2] The rural municipality was established on 10 March 2017, when Government of Nepal restricted all old administrative structure and announced 744 local level units (although the number increased to 753 later) as per the new constitution of Nepal 2015.

[3][4] Raniban, Kasikandh, Bansi Bada Khola and part of Kharigaira Village development committees were incorporated to form this new rural municipality.

[2] At the time of the 2011 Nepal census, Mahabu Rural Municipality had a population of 19,277.

[5] In terms of ethnicity/caste, 24.7% were Chhetri, 20.3% Thakuri, 15.8% Magar, 15.1% Kami, 8.1% Hill Brahmin, 4.2% Sarki, 3.8% Gurung, 3.3% Damai/Dholi, 2.2% Sanyasi/Dasnami, 1.2% other Dalit, 0.8% Badi, 0.1% Marwadi and 0.2% others.