Where in the World is Nouakchott found? Nouakchott is the capital of Mauritania (Islamic Republic of Mauritania), situated in the Western Africa subregion of Africa. In Nouakchott, the currency used is Mauritanian ouguiya (UM), which is the official currency used in Mauritania. The Latitude, Longitude cordinates of Nouakchott are 18.0858, -15.9785.