Otto Pettersonfjellet is a mountain in Nathorst Land at Spitsbergen, Svalbard. It extends over a length of about seven kilometers, and its highest peak is 1,076 m.a.s.l. It is named after Swedish oceanographer Sven Otto Petterson.[1] The glacier of Storvolbreen is between Otto Pettersonfjellet and Storvola,[2] and Tarmbreen separates Otto Pettersonfjellet from Gloføykja.[3]