The Idrisid Emirate of Asir was a state located in the Arabian Peninsula. The Emirate was in the geographical region of Asir and Jizan, in what is now southwestern Saudi Arabia, and extending to Hodeidah, northwest of Yemen.

Yemen Vilayet was a first-level administrative division (vilayet) of the Ottoman Empire. At the beginning of the 20th century it reportedly had an area of 200,000 square kilometres (77,200 sq mi). The population for the vilayet is given by the 1885 Ottoman census as 2,500,000.