Eduard Gustav Freiherr von Toll (Russian: Эдуа́рд Васи́льевич Толль, romanized: Eduárd Vasíl'evič Toll'; 14 March [O.S. 2 March] 1858 – 1902), better known in Russia as Eduard Vasilyevich Toll and often referred to as Baron von Toll, was a Baltic German geologist and Arctic explorer. He is most notable for leading the Russian polar expedition of 1900–1902 in search of the legendary Sannikov Land, a phantom island purported to lie off Russia's Arctic coast. During the expedition, Toll and a small party of explorers disappeared from Bennett Island, and their fate remains unknown to this day.