Kosamba is a city and municipality located in the Mangrol Taluka of the Surat district in the Indian state of Gujarat. It falls within the jurisdiction of the Surat Metropolitan Region.
The area consists of two distinct twin towns: Tarsadi Nagarpalika and Kosamba Gram Panchayat. While these two entities possess independent civic bodies, they are both generally identified as Kosamba, with Tarsadi being the larger of the two municipalities.