Baron Anton Antonovich Delvig (Russian: Антон Антонович Дельвиг; 17 August 1798, Moscow - 26 January 1831, St. Petersburg) was a Russian poet and journalist who studied in the Tsarskoye Selo Lyceum together with Alexander Pushkin, with whom he became a close friend. Pushkin dedicated a poem ('O, Delvig') to him. Delvig commissioned a portrait of Pushkin from Orest Kiprensky which Pushkin bought from Delvig's widow after his friend's death.

In his poetry, Delvig upheld the waning traditions of Russian Neoclassicism. He became interested in Russian folklore and wrote numerous imitations of folk songs. Some of these were put to music by the composers Alexander Alyabyev, Mikhail Glinka and Dmitri Shostakovich (14th Symphony, movement 9).

As a journalist, Delvig edited the periodical Northern Flowers (1825–1831), in which Pushkin was a regular contributor. In 1830–1831, he co-edited with Pushkin the Literaturnaya Gazeta (1830–1831), which was banned by the Tsarist government after information laid by Faddei Bulgarin.