Vasili, Vasily, Vasilii or Vasiliy (Russian: Василий) is a Russian masculine given name of Greek origin and corresponds to Basil. It may refer to:

• Vasily I of Moscow Grand Prince from 1389–1425
• Vasily II of Moscow Grand Prince from 1425–1462
• Vasili III of Russia Grand Prince from 1505–1533
• Vasili IV of Russia Tsar from 1606–1610
• Basil Fool for Christ (1469–1557), also known as Saint Basil, or Vasily Blazhenny
• Vasily Alekseyev (1942–2011), Soviet weightlifter
• Vasily Arkhipov (1926–1998), Soviet Naval officer in the Cuban Missile Crisis
• Vasily Boldyrev (1875–1933), Russian general
• Vasily Chapayev (1887–1969), Russian Army commander
• Vasily Chuikov (1900–1982), Soviet marshal
• Vasily Degtyaryov (1880–1949), Russian weapons designer and Major General
• Vasily Dzhugashvili (1921–1962), Stalin's son
• Vasili Golovachov (born 1948), Russian science fiction author
• Vasily Grossman (1905–1964), Soviet writer and journalist
• Vasily Ignatenko (1961–1986), Soviet firefighter in the aftermath of the Chernobyl disaster
• Vasilii Alekseevich Iskovskikh (1939–2009), Russian mathematician
• Vasily Kuznetsov (1901–1990), Soviet politician, acted three times as head of state of USSR
• Vasyl Ivanchuk (born 1969), Ukrainian chess grandmaster
• Wassily Kandinsky (Vasily Kandinsky; 1866–1944), Russian painter and art theorist.
• Vasily Karatygin (1802–1880), Russian actor
• Vasily Lanovoy (1934–2021), Russian actor
• Vasily Livanov (born 1935), Russian actor and screenwriter
• Vasily Lobanov (born 1947), Russian composer and pianist
• Vasyl Lomachenko (Vasily Lomachenko; born 1988), Ukrainian boxer
• Vasily Markovich (born 1955), Belarusian politician
• Vasily Nezabitovsky (1824–1883), Ukrainian jurist
• Vasily Petrenko (born 1976), Russian conductor
• Vasily Podkolzin (born 2001), Russian ice hockey player currently playing for the Vancouver Canucks
• Vasily Seseman (1884–1963), Russian and Lithuanian philosopher
• Vasily Smyslov (1921–2010), Soviet chess player
• Vasily Tsibliyev (born 1954), Russian cosmonaut
• Vasily Zaytsev, Soviet sniper
• Vasily Zakharov (1934–2023), Soviet culture minister
• Vasily Zhdanov (born 1963), Soviet cyclist

• Vasilii, a character from the Twilight book and film series
• Vasily Borgov, a character from the novel The Queen's Gambit by Walter Tevis and in the Netflix miniseries of the same title based on the novel
• Vasily Petrovych Goloborodko, protagonist of the TV series Servant of the People
• Vasily Lantsov, a character from the Grishaverse book series by Leigh Bardugo
• Vasily Pavlichenko, a character from Satoru Noda's seinen manga series, Golden Kamuy

• Wassily
• Wassily Chair, 1920s furniture, named after Wassily Kandinsky (Vasily Kandinsky)
• Vasilyev, surname
• Vasyl, (Ukrainian: Василь), Ukrainian masculine given name
• Vasil (Bulgarian and Macedonian: Васил, Georgian: ვასილ), Bulgarian, Macedonian and Georgian masculine given name
• Vasilisa (name), the feminine form of the name