Khlong Chak Phra is a khlong (canal) in Bangkok's Thonburi area. It branches off from Khlong Bangkok Noi in front of Wat Suwan Keree and flows until it meets the confluence of Khlong Mon and Khlong Bangkok Yai. Throughout its entire length, it serves as the boundary between Bangkok Noi and Taling Chan Districts. The canal is about 10–15 m wide and 5.45 km long. Like Khlong Bangkok Yai and Khlong Bangkok Noi, Khlong Chak Phra is a natural waterway formed from an old course of the Chao Phraya River during the Ayutthaya period.