Bania (Devanagari: बनिया) is a Nepalese caste from the Newar community of the Kathmandu Valley in Nepal. The name Bania is derived from the Sanskrit word vanijya (merchant); by preference, Newar Banias anglicise their name as Bania rather than Baniya in order to distinguish themselves from the Indo-Nepali trading caste.
Banias belong to the Urāy group which includes Tuladhar, Kansakar, Tamrakar, Sthapit, Sindurakar, Selalik and other castes. They speak Nepal Bhasa as a mother tongue and follow Newar Buddhism.
According to the division of labour laid down from the past, Banias are herbalists and wholesalers of raw materials for Newar, Tibetan and Āyurvedic traditional medicines. Traditional Bania neighborhoods in Kathmandu are Itum Bahal and Bania Chuka where the streets are lined with herbal shops.
Banias participate in the performance of Gunla Bajan religious music. Samyak is the greatest Newar Buddhist festival held every 12 years in Kathmandu where statues of Dipankara Buddha are displayed. During this festival, each Urāy caste has been assigned a duty from ancient times, and Banias have the task of preparing and serving "sākhahti", a soft drink made by mixing brown sugar and water.