Bang Chang (Thai: บางช้าง, pronounced [bāːŋ t͡ɕʰáːŋ]) is a subdistrict (tambon) of Amphawa district, Samut Songkhram province, central Thailand.
During that time, Bang Chang was the name of entirety Samut Songkhram province, its area covered to parts of Bang Khonthi and Mueang Samut Songkhram districts with Damnoen Saduak district in Ratchaburi province as well.
She was also the origin of the royal family surname na Bang Chang (ณ บางช้าง).
Bang Chang is located 8 km (4.97 mi) from the downtown Samut Songkhram.
The administration of Bang Chang subdistrict is responsible for an area that covers 2,745 rai ~ 4.39 square kilometres (1.69 sq mi) and consists of nine villages (muban), as of December 2023: 4,531 people and 1,874 households.