Johan Randulf Bull (29 April 1749 – 28 February 1829) was a Norwegian judge. He was born in Stod, as the brother of Johan Lausen Bull. He took the jurist examination in Copenhagen in 1778, and was a member of Det Norske Selskab there. He played the role figure "Mads" at the premiere of Johan Herman Wessel's satirical play Kierlighed uden Strømper in 1772. From 1802 he was County Governor of Søndre Bergenhus Amt (today named Hordaland). He was instrumental in organising the defence of Bergen during the war with Great Britain in 1807.