Illarion Vasilchikov

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{{infobox military person

|name = Illarion Illarionovich Vasilchikov

|image = I.I. Vasilchikov.JPG

|caption=Illarion I. Vasilchikov in 1850s

|birth_date = 1805

|death_date = 12 November 1862

|death_place = Kiev, Russian Empire

|allegiance = Russian Empire

|branch = Imperial Russian Army

|rank = lieutenant general

|commands = Chief of Staff to general Menshikov's Crimea command, 1855. Edward Crankshaw, The Shadow of the Winter Palace, McMillan 1976, p155 Kiev Military District

}}

Illarion Illarionovich Vasilchikov (1805 – 12 November 1862) was an Imperial Russian general and the great grandson of emperor Alexander I of Russia. He was the son of Illarion Vasilyevich Vasilchikov and Vera Vasilchikova. He was the father of Sergei Vasilchikov. One of his daughters married Alexander Meyendorf. He was a recipient of the Order of Saint Alexander Nevsky, the Order of Saint Anna, the Order of Saint Vladimir and the Order of the White Eagle (Russian Empire). He is buried at Kiev Pechersk Lavra in Ukraine.