Side one
01. Ommadawn
(Part one)

Side two
01. Ommadawn
(Part two)
02. On Horseback

Ommadawn is the third record album by Mike Oldfield, released in 1975 on Virgin Records. The cover photograph was by David Bailey. It peaked at #4 on the UK Albums Chart. The album was reissued by Mercury Records in June 2010 with additional content.

As with Hergest Ridge and Tubular Bells, Ommadawn is another two-movement work. Oldfield sought out the ancient Celtic influence on English music and composed for traditional instruments such as uilleann pipes on the original LP version. A set of Northumbrian smallpipes were also recorded, and credited to "Herbie", but this recording was not used on the album.

The album was recorded at Oldfield's home at Hergest Ridge, The Beacon, and was the only album to be recorded there (though Oldfield's previous album shares its name with the location).

A quadrophonic remix version of Ommadawn was released on Boxed a year later. Oldfield's 1990 album Amarok was conceived as a sequel to Ommadawn, but turned into something quite different; Virgin had been pushing Oldfield for a sequel to Tubular Bells. Excerpts from Ommadawn were featured in the 1979 NASA film, The Space Movie.

The topic of Ommadawn is covered in the final episode of the Tony Palmer documentary series All You Need is Love; episode 17 "Imagine (New Directions)".

In June 2010 the album was reissued by Mercury Records.

In his autobiography, Changeling, Oldfield states that he just wanted "sounds" not "sensible" lyrics. He asked Clodagh Simonds to write down the first words that came into her head. This resulted in the following in English: "Daddy's in bed, The cats drinking milk, I'm an idiot, And I'm laughing." Oldfield states that Clodagh phoned a relative or friend to translate into Irish for the song. The word "idiot" translated into amadán which he Anglicised into "Ommadawn" for the title of the album.

Oldfield previously denied this meaning of ommadawn, calling it a nonsense word, apparently as a ruse to enhance the mystery of his music.

A small portion of Ommadawn "Part One" was used as the theme music for the BBC's Jackanory on occasions when John Grant narrated his Littlenose stories.

Though the actual work Ommadawn is a two-part piece, there is a third track on the album, a short vocal song by Mike Oldfield and William Murray called "On Horseback". "On Horseback" relates to Oldfield, Murray and Leslie Penning's time riding ponies around the area of Hergest Ridge.

In November 1975, Oldfield released the single "In Dulci Jubilo", with "On Horseback" as the B-side. It reached number 4 in the UK Singles Chart in January 1976. In France, "In Dulci Jubilo" was coupled to a remix of the end of part 1 of Ommadawn. Some copies of the album also include "In Dulci Jubilo" at the end, instead of "On Horseback".

"On Horseback" is not listed on the record label, but added to the length of "Ommadawn (Part Two)", giving it a new length of 17:17. It is, however, referred to on the inner sleeve where it is noted that "the words to the horse song on side two by Mike Oldfield and William Murray". The songsheet for "On Horseback" says "Music by Mike Oldfield, Words by Mike Oldfield and William Murray".

Oldfield involved musicians noted for their work in folk music including Clodagh Simonds and Paddy Moloney. He combined this with heavy African influences, mainly by the use of the drummers of Jabula. This makes Ommadawn one of the first successful world music albums in Europe.

Two electric guitars which feature on the album are a red Gibson SG Junior and a blonde Fender Telecaster. Oldfield appears to have been using two electric bass guitars at the time; a Fender Precision and a Gibson EB-3. An acoustic bass built by Tony Zemaitis and a Ramirez classical guitar feature on the album. The piano on the album is likely to be a Bösendorfer. A Fender lap steel guitar is also thought to feature on "On Horseback", although uncredited. Many of Oldfield's instruments from this period are shown in a photograph which was included in the Boxed 4-LP box set.

• Mike Oldfield – acoustic bass, acoustic guitar, banjo, bouzouki, bodhrán, classical guitar, electric bass, electric guitars, electronic organs, glockenspiel, harp, mandolin, percussion, piano, spinet, steel guitar, synthesizers, twelve-string guitar and vocals.
• Herbie – Northumbrian bagpipes
• Don Blakeson – trumpet
• The Hereford City Band conducted by Leslie Penning – brass
• Jabula (Julian Bahula, Ernest Mothle, Lucky Ranku, Eddie Tatane) – African drums
• Pierre Moerlen – timpani
• Paddy Moloney – uilleann pipes
• William Murray – percussion
• Sally Oldfield – vocals
• Terry Oldfield – Panpipes
• Leslie Penning – recorders
• "The Penrhos Kids" (Abigail, Briony, Ivan and Jason Griffiths) – vocals on "On Horseback"
• Clodagh Simonds – vocals
• Bridget St John – vocals
• David Strange – cello

Side one
01. Ommadawn
(Part one)
The original 1975 stereo album mix

Side two
01. Ommadawn
(Part two)
02. On Horseback
The original 1975 stereo album mix

On 7 June 2010 the album was re-released by Mercury Records. This came part of a deal in which Oldfield's Virgin albums were transferred to the label. Bonus features for the album include a 2010 5.1 mix of the album and a track titled the 'lost version'. The album includes "In Dulci Jubilo", "First Excursion", "Argiers" and "Portsmouth".

The original LP artwork was restored; in previous CD issues the text had been centralised and increased in size. A 180 gram vinyl was released as a part of the Back to Black series. The digital edition contains the content from the 2 CDs of the Deluxe Edition. The Japanese release uses the SHM-CD (Super High Material CD) manufacturing process.

There is also a limited edition box set of the album, comprising a deluxe edition, an LP and a framed, numbered and signed print of the album artwork. Only 250 copies were produced which were sold through mikeoldfieldofficial.com and released on 14 June. There are no un-signed variants.

Standard Edition
01. "Ommadawn (Part One) 2010 Stereo Mix by Mike Oldfield
02. "Ommadawn (Part Two)" / "On Horseback" 2010 Stereo Mix by Mike Oldfield
03. "In Dulci Jubilo"
04. "First Excursion"
05. "Argiers"
06. "Portsmouth"

Deluxe Edition
CD 1
01. "Ommadawn (Part One) 2010 Stereo Mix by Mike Oldfield
02. "Ommadawn (Part Two)" / "On Horseback" 2010 Stereo Mix by Mike Oldfield
03. "In Dulci Jubilo"
04. "First Excursion"
05. "Argiers"
06. "Portsmouth"
CD 2
01. "Ommadawn (Part One)" 1975 Stereo Mix
02. "Ommadawn (Part Two)" / "On Horseback" 1975 Stereo Mix
03. "Ommadawn (Lost Version)" 1975 Demo
DVD
01. "Ommadawn (Part One)" 2010 5.1 Surround Mix by Mike Oldfield
02. "Ommadawn (Part Two)" / "On Horseback" 2010 5.1 Surround Mix by Mike Oldfield
03. "In Dulci Jubilo"
04. "Portsmouth"