| Kevin O'Connell's output falls into several sections: Original compositions (below) | Didactic works | Arrangements | Selected writings - Three Studies for String Quartet (1979)
- Variants for Six Instruments (1980)
- Duo for Violin and Piano (1982)
- Five pieces for clarinet in b flat
- Five Poems of Emily Dickinson (1983)
- Concertino for twelve players (1984)
- String Trio (1986)
- Failte don Ean for a capella chorus (1987)
- Sonata for Saxophone and Piano (1987)
- Einzeichnung for large ensemble (1987)
- From the Besieged City for mezzo-soprano and symphony orchestra (1988-1989)
- Concerto for Violin and Chamber Orchestra (1990)
- Tenebrae for Clarinet, Violin and Cello (1991)
- Sensational! Opera in one act (1992)
- Sonata for Cello and Piano (1992-1994)
- The Fireking Opera in two acts (1993-1995)
- Carrickfergus for piano four hands (1994)
- The Carman’s Whistle for chamber orchestra (after William Byrd) 1996
- My Love my Umbrella (1996-97) Opera in two acts
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