This paper aims to clarify the formation and transformation of the existing villages and traditional houses of ethnic Cham Muslim in the Mekong Delta. The authors have conducted extensive fieldworks to investigate the current condition of 9 Cham villages, compiling the database of over 2, 500 houses and 151 floor plans. According to the survey’s result, the extant Cham Muslim villages and their traditional housing, the Sang house, have unique characteristics that relate to the waterways and is influenced by Islamic principles. To this day, the Sang house remains an autochthonous type imported by the ethnic Cham Muslim without many transformations.