Wat Kamphaeng Bang Chak (Thai: วัดกำแพงบางจาก, pronounced [wát kām.pʰɛ̄ːŋ bāːŋ t͡ɕàːk]) is an ancient Thai Buddhist temple in Mahā Nikāya sect in Thonburi side (west side of Chao Phraya River) of Bangkok, considered as one of the oldest and most dominant temples in Bangkok.

The temple is believed to have been built since the late Ayutthaya period without knowing the exact history.

Principal Buddha image in Māravijaya posture named Luang Pho Butsarakham enshrined inside, the overall appearance of the ordination hall is an art in the late Ayutthaya period.

But the materials that decorate various parts was influenced by Chinese architectural style, which is a popular pattern in the reign of King Rama III.

It is a small temple that is known for its perfectly laid out layout and still maintains the original condition of the entire architecture and the murals were preserved almost completely.