Dantmara Union () is a union parishad of Bhujpur Thana of Chittagong District, Bangladesh. It has an area of 23,474 acres (95 km2) and had a population of 75,000 in 2011. Baganbazar Union lies to the north, Manikchhari Upazila to the east, Narayanhat Union to the south and the Sitakunda mountain range to the west.
