Count Illarion Ivanovich Vorontsov-Dashkov was a notable representative of the Vorontsov family. He served as Minister of Imperial Properties in 1881-97 and the Governor-General of the Caucasus Viceroyalty between 1905 and 1915.

The Caucasus Viceroyalty was the Russian Empire's administrative and political authority in the Caucasus region exercised through the offices of glavnoupravlyayushchiy and namestnik ("viceroy"), situated in the modern areas of the Russian Federation, Armenia, Azerbaijan and Georgia. These two terms are commonly, but imprecisely, translated into English as viceroy, which is frequently used interchangeably with governor general. More accurately, glavnoupravlyayushchiy is referred to as the High Commissioner of the Caucasus, and namestnik as Viceroy.