"Oceania" is a song recorded by Icelandic singer Björk for her sixth studio album Medúlla. It was written and produced by Björk, with additional writing by Sjón and production by Mark Bell. The song was written by the singer specially for the 2004 Summer Olympics Opening Ceremony, after a request by the International Olympic Committee. "Oceania" was released as a promotional single on 13 August 2004, by One Little Indian Records. The song was written at the ocean's point of view, from which the singer believes all life emerged, and details the human's evolution, whilst accompanied by a choir. "Oceania" was generally well received by music critics, who believed it was the best track from Medúlla, although some thought it was not the best choice for a promotional release.

The accompanying music video for the song, directed by Lynn Fox, features Björk as "Mother Oceania", whilst being jewel-encrusted in dark watery depths, with a colourful sunset and swirling floral creatures above her. A remix of the song, featuring additional lyrics and vocals by Kelis on her point of view of the continents, was featured as a B-side to the "Who Is It" single. A piano version also appeared on the DVD single, and was assisted in its creation by Nico Muhly. The song was premiered during Björk's performance on the Summer Olympics ceremony, and was later included on the setlist of the Volta Tour (2007–08). At the 47th Grammy Awards in 2005, it was nominated in the category of Best Female Pop Vocal Performance. Cover versions of "Oceania" were done six times, while it was sampled once.