Bang Chang (Thai: บางช้าง, pronounced [bāːŋ t͡ɕʰáːŋ]) is a subdistrict (tambon) of Amphawa district, Samut Songkhram province, central Thailand.

Bang Chang's history dates to the Ayutthaya Kingdom. 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.

Between Ayutthaya to early Rattanakosin periods, Bang Chang was dubbed "Suan Nok" (outer garden), paired with "Suan Nai" (inner garden) or Bangkok. Because they have a very similar terrain, which was filled with orchards and there was many watercourses flowing through both areas.

Bang Chang has long been known for being an area for agriculture, especially mango.

Its name "Bang Chang" meaning "place of elephants", because it used to be a habitat for many herd of wild elephants and was also a hideout for the white elephants.^[2]

Until the establishment of Amphawa district officially, Bang Chang were reduced to subdistrict and changed the name to "Pak Ngam" (ปากง่าม), consisting of 12 administrative villages.

In the year 1941, its name therefore changed again to Bang Chang in accordance with the original name. Khun Bang Chang (ขุนบางช้าง) was the first head of the subdistrict.^[3]

Bang Chang was also the birthplace of Amarindra, the Queen Consort of King Phutthayotfa Chulalok (Rama I), and the mother of King Phutthaloetla Naphalai (Rama II). She was also the origin of the royal family surname na Bang Chang (ณ บางช้าง).^[4]

The lowland area has a majority of horticulture.

Neighboring subdistricts are (from the north clockwise): Bang Phrom of Bang Khonthi district, Khlong Khoen and Ban Prok of Mueang Samut Songkhram district, Amphawa and Khwae Om in its district.

Bang Chang is located 8 km (4.97 mi) from the downtown Samut Songkhram.^[3]

Most Bang Chang residents work in agriculture.

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.^[1]

Bang Chang is administered by the Bang Chang subdistrict administrative organization - SAO (ongkan borihan suan tambon - o bo to), which covers the whole subdistrict.

• Traditional Thai sweets
• Benjarong (traditional five-coloured Thai ceramics)
• Bang Chang bird's eye chilli
• Shredded tobacco^[2]

13°25′59.3″N 99°58′06.2″E / 13.433139°N 99.968389°E / 13.433139; 99.968389