Vapi is a city and a municipality in Valsad district in the Indian state of Gujarat. It is situated on the banks of Damanganga River in southern Gujarat, India. Vapi falls under the taluka administration of Pardi.
Around 28 km south of the district headquarter city of Valsad, it is surrounded by Union Territories of Daman on the west and by Dadra and Nagar Haveli on the east. Economic and industrial growth of the recent decades has, however, blurred the physical boundaries, and the small stretch of roughly 21 km of Daman-Vapi-Silvassa has almost become a monolith.
The industrial township of Vapi holds its place of importance on the "industrial" map and it is the largest industrial area in Asia in terms of small-scale industries, dominated by chemical industry plants, along with their unfortunate hazards.
It also has the dubious distinction of being on the list of the 10 Worst polluted places in the world.