Count Illarion Ivanovich Vorontsov-Dashkov (Russian: Илларио́н Ива́нович Воронцов-Дашков; 27 May 1837 – 15 January 1916) was a notable representative of the Vorontsov family.

Alexander III put Vorontsov-Dashkov in charge of the imperial court and made him Full General of Cavalry.

[1] As Russia's second-to-last viceroy of the Caucasus, Vorontsov-Dashkov implemented several reformist policies, but his time in office was marred by a general era of revolution, war, and social upheaval.

[2] He was officially in charge of the victorious Russian forces in the Battle of Sarikamish during the early months of World War I, although the effective command lay with General Alexander Myshlayevsky.

He married in 1867 Countess Elizaveta Andreevna Shuvalova, daughter of Count Andrei Petrovich Shuvalov.