Grigori Yefimovich Rasputin (21 January [O.S. 9 January] 1869 – 30 December [O.S. 17 December] 1916) was a Russian mystic and faith healer. He is best known for having befriended the imperial family of Nicholas II, the last Emperor of Russia, through whom he gained considerable influence in the final years of the Russian Empire.

Rasputin was born to a family of peasants in the Siberian village of Pokrovskoye, located within Tyumensky Uyezd in Tobolsk Governorate (present-day Yarkovsky District in Tyumen Oblast). He had a religious conversion experience after embarking on a pilgrimage to a monastery in 1897 and has been described as a monk or as a strannik (wanderer or pilgrim), though he held no official position in the Russian Orthodox Church. In 1903 or in the winter of 1904–1905, he travelled to Saint Petersburg and captivated several religious and social leaders, eventually becoming a prominent figure in Russian society. In November 1905, Rasputin met Nicholas II and his empress consort, Alexandra Feodorovna.

In late 1906, Rasputin began acting as a faith healer for Nicholas' and Alexandra's only son, Alexei Nikolaevich, who suffered from haemophilia. He was a divisive figure at court, seen by some Russians as a mystic, visionary, and prophet, and by others as a religious charlatan. The extent of Rasputin's power reached an all-time high in 1915, when Nicholas left Saint Petersburg to oversee the Imperial Russian Army as it was engaged in the First World War. In his absence, Rasputin and Alexandra consolidated their influence across the Russian Empire. However, as Russian military defeats mounted on the Eastern Front, both figures became increasingly unpopular. In the early morning of 30 December [O.S. 17 December] 1916, Rasputin was assassinated by a group of conservative Russian noblemen who opposed his influence over the imperial family.

Historians often suggest that Rasputin's scandalous and sinister reputation helped discredit the Tsarist government, thus precipitating the overthrow of the House of Romanov shortly after his assassination. Accounts of his life and influence were often based on common rumors; he remains a mysterious and captivating figure in popular culture.

Grigori Yefimovich Rasputin was born a peasant in the small village of Pokrovskoye, along the Tura River in the Tobolsk Governorate (now Tyumen Oblast) in the Russian Empire. According to official records, he was born on 21 January [O.S. 9 January] 1869 and christened the following day. He was named for St. Gregory of Nyssa, whose feast was celebrated on 10 January.

There are few records of Rasputin's parents. His father, Yefim (1842–1916), was a peasant farmer and church elder who had been born in Pokrovskoye and married Rasputin's mother, Anna Parshukova (c. 1840 – 1906), in 1863. Yefim also worked as a government courier, ferrying people and goods between Tobolsk and Tyumen. The couple had seven other children, all of whom died in infancy and early childhood; there may have been a ninth child, Feodosiya. According to historian Joseph T. Fuhrmann, Rasputin was certainly close to Feodosiya and was godfather to her children, but "the records that have survived do not permit us to say more than that".

According to historian Douglas Smith, Rasputin's youth and early adulthood are "a black hole about which we know almost nothing", though the lack of reliable sources and information did not stop others from fabricating stories about Rasputin's parents and his youth after his rise to prominence. Historians agree, however, that like most Siberian peasants, including his mother and father, Rasputin was not formally educated and remained illiterate well into his early adulthood. Local archival records suggest that he had a somewhat unruly youth—possibly involving drinking, small thefts and disrespect for local authorities—but contain no evidence of his being charged with stealing horses, blasphemy or bearing false witness, all major crimes later imputed to him as a young man.

In 1886, Rasputin traveled to Abalak, some 250 km east-northeast of Tyumen and 2,800 km east of Moscow, where he met a peasant girl named Praskovya Dubrovina. After a courtship of several months, they married in February 1887. Praskovya remained in Pokrovskoye throughout Rasputin's later travels and rise to prominence, and remained devoted to him until his death. The couple had seven children, though only three survived to adulthood: Dmitry (b. 1895), Maria (b. 1898), and Varvara (b. 1900).