The Final Fantasy XI Original Soundtrack, a compilation of almost all of the music in the game, was released by DigiCube in 2002, and subsequently re-released by Square Enix in 2004.

Several songs, especially "Distant Worlds", remain popular today, and have been performed numerous times in orchestral concert series, as well as being published in arranged and compilation albums by Square as well as outside groups.

The music of Final Fantasy XI was scored by Nobuo Uematsu, Naoshi Mizuta, and Kumi Tanioka.

[2] According to Uematsu, the choice of language was meant to symbolize the developers' hope that their online game could contribute to cross-cultural communication and cooperation.

[5] Final Fantasy XI Original Soundtrack reached #25 on the Japan Oricon charts, selling over 13,200 copies[6][7] It received mixed reviews by critics, with Ben Schweitzer of RPGFan finding it to be a "strong" album, if "slower" and "more repetitive than previous Final Fantasy scores".

[5] Chris of Square Enix Music Online, however, felt that while it was "not instantly likable" that it had "the potential to become a favorite with multiple listens".

[1] Final Fantasy XI Rise of the Zilart Original Soundtrack reached #53 on the Oricon charts and sold nearly 6,700 copies.

[1] Chris of Square Enix Music Online agreed, terming it "a very well-produced soundtrack" and "a consistent and fitting effort".

[9][13] Patrick Gann expressed himself as "disappointed" and said that the album was full of "boring, repetitive string-work" instead of Mizuta's usual "strong, raw instrumentation".

The majority of the tracks are smooth jazz, with the exception of Awakening and Blessed in Her Glorious Light - The Grand Duchy of Jeuno, which encompass electronica and gospel respectively.

[15] Chris of Square Enix Music Online was much harsher towards the album, finding it to be "fundamentally flawed" due to a lack of coherence and disliked several of the tracks, especially the ones arranged by Mizuta.

[18] Final Fantasy XI Treasures of Aht Urhgan Original Soundtrack was well received by critics, with Patrick Gann describing it as "wonderful", and saying that "nearly every song has its own memorable feel".

[21] Final Fantasy XI Unreleased Tracks was well received by critics such as Patrick Gann, who said that it was an album full of "interesting pieces".

Patrick Gann termed it "excellent" and praised the technical skills of the performers, though he disliked the short length of the album.

[21] Jillian of Square Enix Music Online, on the other hand, was "disappointed" with the album, finding the arrangements to be "simplistic" and the performances, while good technically, to be lacking in passion.

[29] It was well received by Patrick Gann, who termed the arrangements as strong and balanced, and called the total album a "lovely little surprise".

[28] Final Fantasy XI 8th Anniversary: Memories of Dusk and Dawn is a compilation album of tracks from the game and its expansions.

The music on the first disc was composed by Naoshi Mizuta and comes from the Wings of the Goddess expansion, the three add-on scenarios and the Abyssea trilogy.

The second disc contains the background tracks of the PlayOnline Viewer composed by Noriko Matsueda and Kumi Tanioka of which only two had been previously released as part of the Memories of Dusk and Dawn compilation.

[35] Forever Today: Final Fantasy XI Seekers of Adoulin OST PLUS received better reviews, with Patrick Gann of RPGFan terming it a "digital-only nugget of goodness" containing a few solid tracks by Mizuta.

[34] Final Fantasy XI Priceless Remembrance is a Blu-Ray soundtrack album containing music from the Rhapsodies of Vana'diel add-on.

[36] Uematsu continues to perform certain pieces in his Dear Friends: Music from Final Fantasy concert series.