Tuanku Bujang bin Tuanku Othman (Jawi: توانكو بوجانج بن توانكو عثمان‎; 12 December 1898^[1] – 28 November 1986) was a Malaysian politician who served as the 2nd Yang di-Pertua Negeri (Governor) of Sarawak from 1969 to 1977.^[2]

Born to a renowned Malay family in Sibu with distant Hadhrami Arab ancestry, he was educated in a Malay school and later joined the Sarawak Civil Service as a Native Officer in 1934. He was awarded the title of "Datu" in June 1954, and a year later was promoted to Sarawak Administrative Service as an officer and he later retired from Sarawak Government Civil Service in December 1960.

After his retirement from the Civil Service, he became the president of Barisan Ra'ayat Jati Sarawak (BARJASA) in 1962, a political party in favour of the formation of Malaysia. After the establishment of Malaysia, he was appointed as senator in 1963, and was awarded Panglima Setia Mahkota (P.S.M.), which carries the title "Tan Sri" by the Malaysian Government.

He was appointed as the second Yang di-Pertua Negeri (Governor of Sarawak) by the King of Malaysia upon the death of the former governor, Tun Abang Haji Openg. Upon the appointment, he was awarded Seri Maharaja Mangku Negara (S.M.N.), which carried the title "Tun". He would serve as the governor for the second term in 1973, before his term ended in 1977.

Little is known about his doing after his tenure as the governor of Sarawak ended in 1977. On 28 November 1986, he died peacefully in Kuching, where he was buried.