Roman Arkadievich Abramovich (born October 24, 1966 in Saratov, Russian SFSR, USSR) is a Russian oil billionaire, referred to as one of the Russian oligarchs. In March 2006 he was listed by Forbes Magazine as the richest Russian, 2nd richest person in Britain and the 11th richest person in the world with an estimated fortune of $18.2 billion. Everyone above him in the list was at least ten years older.

Abramovich is most famous outside of Russia as the owner of Chelsea F.C., an English Premiership football club, his wider involvement in European football, and for his contributions to Jewish enterprises in Israel and elsewhere, reflecting his Jewish roots and affiliation. Despite his high profile around the world Abramovich makes virtually no public statements about his activities. Biographers and journalists can only speculate about the motives and objectives underlying his improbable life.