Masarautar Biu masarautar gargajiya ce da ke a Biu a cikin jihar Borno, Najeriya . Kafin 1920 ana kiran ta da Masarautar Biu. Mai mulkin yanzu, wanda yake a ranar 14 ga watan Satumbar 2020 ya ayyana shi,[1]shi ne Maidalla Mustafa dan Aliyu (b. 1915) wanda ya zama Mai Biu, shi ma ya yi wa Kuthli, a cikin 1959.[2]