Oceanborn is the second studio album by Finnish symphonic metal band Nightwish. It was released in Finland by Spinefarm Records on 7 December 1998 and in the spring of 1999 worldwide. It was released by Drakkar Entertainment in the rest of Europe, and by Toy's Factory in Japan. It is their first album with bassist Sami Vänskä.

Oceanborn has sold more than 68,000 copies in Finland. The single "Sleeping Sun" was released in August 1999, and the song has been included in every reissue of the album since then. The album was released in the US by Century Media in March 2001.

In 2017, Loudwire ranked it as the 10th best power metal album of all time.