Hadhramaut is a geographic region in South Arabia, comprising eastern Yemen, parts of western Oman and southern Saudi Arabia. The name is of ancient origin, and is retained in the name of the Yemeni Governorate of Hadhramaut. The people of Hadhramaut are called Hadarem. They formerly spoke Hadramautic, an old South Arabian language, but they now predominantly speak Hadhrami Arabic.

South Arabia is a historical region that consists of the southern region of the Arabian Peninsula in Western Asia, mainly centered in what is now the Republic of Yemen, yet it has also historically included Najran, Jizan, Al-Bahah, and 'Asir, which are presently in Saudi Arabia, and the Dhofar of present-day Oman.