The Majeerteen, (Somali: Majeerteen, Arabic: ماجرتين; also spelled Majerteen, Macherten, Majertain, or Mijurtin) alternately known as Mohammed Harti, is a Somali sub-clan part of the Harti branch of the Darod clan. Traditionally, they inhabit extensive territories in the Bari, Nugaal, and Mudug regions of Somalia, spanning from Bosaso to Garacad, mainly in Puntland state. Additionally, Majeerteen populations are present in southern towns such as Kismayo.

The Majeerteen Sultanates played an important role in the pre-independence era of Somalia. The Majeerteen also held many other significant government posts in the 1960s and 1970s, and continue to play a key role in Puntland state and Somalia as a whole.

The Majeerteen are traditionally settled in Somalia's northern regions of Bari, Nugal and Mudug. They can also be found in Kismayo in southern Somalia due to migrations starting in the 19th century along with their fellow members of the larger Harti subclan, the Dhulbahante, Dishiishe and Warsangeli.

The Majeerteen are traditionally settled in the land in-between Murcanyo, Bandar Siyad an ancient port town facing the Gulf of Aden, and Garacad a coastal port town, facing the Indian Ocean and all the land in between which corresponds to the area encompassing the Horn of Africa. Therefore, the Majerteen are settled in what is literally considered to be 'the Horn of Africa'.

Some Majeerteen people are also found in the Somali Region in Ethiopia, specifically in the Dollo Zone near the Somalia border. The Majeerteen are part of Darod subclans within Somalia. The Majeerteen are more commonly found in the cities of Bosaso, Garowe and Galkacyo which are all regional capitals of Bari, Somalia, Nugal, Somalia and Mudug respectively.

The Osman Mahmud (Cismaan Maxamuud), Omar Mohamoud (Cumar Maxamuud), and Isse Mahmoud (Ciise Maxamuud) comprise the Maxamuud Saleebaan; which, along with Ali Saleebaan and Ugaar Saleebaan,^{[citation needed]} forms the major subclan of Saleebaan Maxamed (Majeerteen). A 2010 study identifies as both the main division of Majeerteen and a central and unifying entity in Puntland. During the 1960s, the Osman Mahamud, Ali Saleebaan (or Cali Saleebaan), Wadalmoge and Ciise.

Maxamuud formed a powerful business class in Kismayo, while Siad Barre exploited a rivalry between the Cali Saleebaan and Cumar Maxamuud in an effort to weaken the Majeerteen in general. Historically, the Majeerteen formed part of a coastal trading network around the Red Sea and the Indian Ocean, along with other subclans.

The first recorded mention of the Majeerteen (Mijertayne Somauli) clan in English appears in a passage by Henry Salt, who described them as inhabiting the coast of Hafun under the leadership of a certain Sultan Hassan. Salt recounts that the Imam of Muscat had, sometime earlier, sent gifts to the Majeerteen and requested permission to construct a small fort on the coast of Hafun. This request, however, was declined, and the gifts were rejected, maintaining the tribe's independence.