Russian Empire - Population (1720-1914)

Much of Russia's expansion occurred in the 17th century, culminating in the first Russian colonisation of the Pacific in the mid-17th century, the Russo-Polish War (1654–67) that incorporated left-bank Ukraine, and the Russian conquest of Siberia. Poland was divided in the 1790-1815 era, with much of the land and population going to Russia. Most of the 19th century growth came from adding territory in Asia, south of Siberia.

Reference 1: Population of Russia (millions).

Reference 2: 1720, 1795, 1812, 1816 and 1914.

Source: http://en.wikipedia.org/wiki/Russian_Empire