Mayadevi Rural Municipality (Nepali: मायादेवी गाउँपालिका) is a Gaunpalika in Rupandehi District in Lumbini Province of Nepal. On 12 March 2017, the government of Nepal implemented a new local administrative structure, with the implementation of the new local administrative structure, VDCs have been replaced with municipal and Village Councils. Mayadevi is one of these 753 local units.

Bhojpuri is the most spoken language of the Mayadevi Municipality with 71.4% people reporting it as their first language followed by Awadhi with 15.6%, Nepali with 6.5%, Tharu with 5.1% and Others with 1.4%.