Nawab Mir Yousaf Aziz Magsi (born 1908 in Jhal Magsi, Pakistan-May 31, 1935) was a prominent Baloch leader from the present-day Balochistan province of Pakistan. He hailed from the Magsi tribe headquartered in Jhal Magsi, the ancestral home of the Magsi. His title was Nawab, which means "ruling prince" or "tribal chief". His father, Kaiser Khan Magsi, was the Nawab of the Magsi tribe.
Mir Yousaf Khan obtained his education at home. He was able to master Arabic, Persian and Urdu within a few years. Then he was taught English by a private tutor for two years.
In 1922, because of some family problems Yousaf Magsi's father Nawab Kaiser Khan and Yousaf himself had to go into exile in Multan. Yousaf Khan stayed in exile in Multanuntil 1929.