Mukalla, officially the Mukalla City District, is a seaport and the capital city district of Yemen's largest governorate, Hadhramaut. The city is in the southern part of the Arabian Peninsula on the Gulf of Aden, on the shores of the Arabian Sea, about 480 kilometres east of Aden. It is the most important port city in the Hadhramaut region. It is also the sixth-largest city in Yemen, with a population of approximately 595,000 as of 2023.