El Aaiún
According to the Moroccan authorities, El Marsa belongs to Laayoune Province in the region of Laâyoune-Sakia El Hamra. Its population in 2014 is 17,917, the second-largest in the province (behind the regional capital El Aaiún) and third in the region. It has a seaport on the Atlantic Ocean and therefore is also known as "Laayoune Plage" (El Aaiún Port). The town also has a hospital.