The Russian nobility had absorbed the individuals and the families voluntarily or involuntarily moving from the remarkably various regions in the Eurasian continent until the collapse of the Russian Empire. This paper attempts to clarify the features and the tendencies of those immigrants into the eighteenth-century Russian Empire who served the army or the state administration particularly after the 1740s. We focus on some topics, that is, from which country these non-Russian elite had derived, for what reason they chose the emigration to Russia, how they lived and worked in the state organization after the settlement, and so on. Starting with the Petrine reforms, the Russian Imperial government formed the legal conditions for acknowledging tolerance for the immigrants’ religious belief in other Christianity than Russian Orthodoxy and giving them material support, which could be a pull factor in facilitating migration. As compared with the non-Russian elite who moved into the Russian state and worked there in the first half of the eighteenth century, more and more Baltic German noble families began to serve the Russian government after the 1740s, especially in the field of diplomacy. And a lot of French émigrés came to consider Russia their promising destination after the French Revolution. The change in the power relations between the Russian Empire and the Ottoman Empire caused the influx into Russia of the Wallachian and Moldavian nobility and the Greeks deriving from the regions occupied by the Ottoman Empire.