Julius Rudolph Theodor Vogel (30 July 1812 – 17 December 1841) was a German botanist.
He was a privatdozent at Berlin and then from 1839 at the University of Bonn, where he took over duties after the death of Theodor Friedrich Ludwig Nees von Esenbeck.
[1] At the end of 1840 he travelled to England to meet the African Civilization Society, then planning the Niger expedition of 1841.
Taking two years' leave from Bonn, he joined the expedition in May 1841, on the steamer Wilberforce.
Suffering from fever, he died on Fernando Po (now Bioko) of dysentery, on 17 December 1841.