Vladimir Vladimirovich Nabokov (Russian: Влади́мир Влади́мирович Набо́ков [vlɐˈdʲimʲɪr vlɐˈdʲimʲɪrəvʲɪtɕ nɐˈbokəf] (listen); 22 April [O.S. 10 April] 1899 – 2 July 1977), also known by the pen name Vladimir Sirin (Russian: Влади́мир Си́рин), was a Russian novelist, poet, translator and entomologist. His first nine novels were written in Russian (1926–38), but he achieved international prominence after he began writing English prose. Nabokov became an American citizen in 1945.

Nabokov's Lolita (1955) was ranked fourth in the list of the Modern Library 100 Best Novels in 2007; Pale Fire (1962) was ranked 53rd on the same list; and his memoir, Speak, Memory (1951), was listed eighth on publisher Random House's list of the 20th century's greatest nonfiction. He was a finalist for the National Book Award for Fiction seven times.

Nabokov was also an expert lepidopterist and composer of chess problems.