Oceanborn is the second album of Finnish symphonic metal band Nightwish, released in December 1998 in Finland and in the Spring of 1999 worldwide.

Most of the album is fantasy-themed with tracks like "Swanheart" and "Walking in the Air", a cover from the animated motion picture, The Snowman, however other songs such as "Gethsemane" have a more religious feel to them. In addition, there are also some theatrical tracks like "Devil & the Deep Dark Ocean". Oceanborn is among their darker albums, making use of the harsh vocals of Tapio Wilska in the songs "The Pharaoh Sails to Orion" and "Devil & the Deep Dark Ocean".

Since the album's release, "Sacrament of Wilderness" has remained a fan-favorite at concerts, and it's still performed often. Both "Sleeping Sun" and "Walking in the Air" have also been performed often on shows, but "Stargazers" has been dropped since vocalist Tarja Turunen's dismissal in 2005. "Walking in the Air" returned to the live setlist of the band at September 19, 2009 at Hartwall Arena, this time as an acoustic song and sung by the current vocalist Anette Olzon.

Oceanborn has sold more than 68,000 copies in Finland alone.