This study critically assesses Tanzania’s legal regime for controlling marine oil pollution, focusing specifically on the Port of Dar es Salaam. As one of the busiest ports in East Africa, the Port of Dar es Salaam plays a vital role in regional trade, but it is also a significant source of marine oil pollution, threatening marine ecosystems and public health. The study examines the existing national laws, regulations, and policies that govern marine oil pollution in Tanzania, including their alignment with international conventions such as MARPOL. Through a doctrinal legal analysis, the study identifies gaps and weaknesses in the current legal framework, including challenges in enforcement, compliance, and institutional capacity. The study employs an analytical approach, relying on primary and secondary data sources such as books, journal articles, government reports, and laws pertaining to marine pollution. The focus is on evaluating the robustness and comprehensiveness of Tanzania's legal framework in managing marine oil pollution risks. The study reveals significant gaps in Tanzania’s legal regime, highlighting its inadequacy in effectively controlling marine oil pollution.