| Sagan | Nightwish | | | 4:45 | instrument |
| Sahara | Nightwish | | | 5:53 | instrument |
| Sailing to Mexico | The Chieftains with Carlos Núñez | | 1 | 2:02 | instrument |
| Sam Hall | Eric Clapton | | | 5:27 | instrument |
| Samon | Eluveitie | | 3.25 | 1:49 | instrument |
| Samon (acoustic version) | Eluveitie | | 4 | 1:27 | instrument |
| San Campio | The Chieftains with Carlos Núñez | | | 2:47 | instrument |
| Sanctus | Sela | | | 4:36 | instrument |
| Santiago de Cuba | The Chieftains | | | 3:38 | instrument |
| Santonian Shores | Eluveitie | | 3 | 3:58 | instrument |
| Savant | Auri | | | 4:27 | instrument |
| Scarborough Fair | Leaves’ Eyes | | 4.5 | 4:04 | instrument |
| Scarborough Fair | Terry Edwards, London Voices, Greg Knowles, Liam O’Flynn, David Heath, Doug Boyle, Nigel Kennedy, Rory McFarlane, English Chamber Orchestra, Paul Barritt | | | 4:41 | instrument |
| Scarlet Ribbons | Sinéad O’Connor | | 3 | 4:15 | instrument |
| Scorched Earth | Eluveitie | | 3.5 | 4:18 | instrument |
| Scorched Earth | Eluveitie | | | 3:39 | instrument |
| Scully’s | Lúnasa | | | 4:13 | instrument |
| Sea Image | The Chieftains | | | 6:11 | instrument |
| Séan Ó Duibhir a Ghleanna | Liam O’Flynn | | | 3:58 | instrument |
| Sean O’Dwyer of the Glen | John Williams and Dean Magraw | | | 5:23 | instrument |
| Second Nature | Clannad | | 3 | 3:21 | instrument |
| See | Auri | | | 5:13 | instrument |
| Seeds of Love | Loreena McKennitt | | 4 | 4:55 | instrument |
| Seinn alleluia | Lena Hennessy, Newman Vocare Ensemble, The Choral Scholars of University College Dublin, Jane Bergeron O’Keefe, Meadhbh O’Rourke, Mark Redmond | | | 3:50 | instrument |
| Sempiternal Embers | Eluveitie | | 4 | 4:52 | instrument |
| Set Dance & Reel: The Blackbird / Corney is Coming | Andrew Finn Magill | | | 4:13 | instrument |
| Set of Jigs: The Thatcher / Peter Byrne's / The Tripper's | Julie Fowlis | | | 3:41 | instrument |
| Setlon | Eluveitie | | 4 | 2:37 | instrument |
| Seven | Shannon | | | 7:22 | instrument |
| Shadow of the Moon | Blackmore’s Night | | | 7:57 | instrument (als “pipes”) |
| Shadow of the Moon | Blackmore’s Night | | | 8:11 | instrument |
| Shadows in the Night | Leaves’ Eyes | | | 3:48 | instrument |
| Shadows in the Night (instrumental) | Leaves’ Eyes | | | 3:48 | instrument |
| She Is My Sin | Nightwish | | | 4:59 | instrument |
| She Is My Sin | Nightwish | | | 5:14 | instrument |
| She Is My Sin | Nightwish | | | 5:11 | instrument |
| She Is My Sin | Nightwish | | 2.5 | 4:55 | instrument |
| She Moved Through the Fair | Art Garfunkel | | | 3:46 | instrument |
| She Moved Through the Fair | Josh Groban | | | 4:55 | instrument |
| Sheeling O Guira | Jerry O’Sullivan | | | 3:08 | instrument |
| Shenandoah | The Chieftains feat. Van Morrison | | | 3:52 | instrument |
| Shenandoah | Bryn Terfel, London Symphony Orchestra, Barry Wordsworth | | | 4:25 | instrument (als “pipe”) |
| Shifting Sands | Davy Spillane | | | 5:04 | instrument |
| Ship of Doom | Xandria | | | 4:50 | instrument |
| Shoemaker | Nightwish | | 3 | 5:19 | instrument |
| Shoemaker (instrumental) | Nightwish | | | 5:19 | instrument |
| Shooting Star at the Dawn | Alasdair Robertson | | | 3:35 | instrument |
| Shudder Before the Beautiful | Nightwish | | | 6:58 | instrument |
| Shudder Before the Beautiful | Nightwish | | | 6:20 | instrument |
| Shudder Before the Beautiful | Nightwish | | 4.35 | 6:29 | instrument |
| Shudder Before the Beautiful | Nightwish | | | 6:58 | instrument |
| Shudder Before the Beautiful | Nightwish | | 2 | 6:34 | instrument |
| Si Bheag Si Mhor / John Ryan's Polka | Milladoiro | | | 3:32 | instrument |
| Sign of the Dragonhead | Leaves’ Eyes | | 4 | 4:07 | instrument |
| Sign of the Dragonhead (instrumental) | Leaves’ Eyes | | | 4:07 | instrument |
| Signed Fictitous | Vernon Reid | | | 2:42 | instrument |
| Sigrlinn | Leaves’ Eyes | | 3 | 8:47 | instrument |
| Silent Night | The Choir of Christ Church Cathedral, Dublin | | | 2:56 | instrument |
| Silent Night | The Celtic Tenors | | | 3:10 | instrument |
| Single Jigs: Hug the Bundle / Maloney's / Thomas Reilly clerk of Fore | Brian McNamara | | | 3:30 | instrument |
| Single Jigs: Stoney Batter / The Templehouse / Grier's #37 | Brian McNamara | | | 4:10 | instrument |
| Siraxta | Eluveitie | | 4.35 | 5:39 | instrument |
| Sista Jane | Black Country Communion | | 5 | 6:54 | instrument |
| Six Days | Cellar Darling | | | 5:50 | instrument |
| Sixteenth Century Greensleeves | Blackmore’s Night | | | 6:43 | instrument |
| Skeleton Tree | Auri | | | 4:19 | instrument |
| Skellig | Clannad | | 4 | 4:47 | instrument |
| Skibbereen | Hazel O’Connor | | | 5:54 | instrument |
| Skin of Mankind | Mostly Autumn | | | 4:27 | instrument |
| Skye Boat Song | Nicky Spence, Neil Martin | | | 4:19 | instrument |
| Slania (folk medley) | Eluveitie | | | 1:53 | instrument |
| Slania’s Song | Eluveitie | | | 7:03 | instrument |
| Slanias Song | Eluveitie | | 4 | 5:41 | instrument |
| Slanias Song | Eluveitie | | | 6:36 | instrument |
| Sleep with the Ancients | The Spirit of Eden | | | 5:56 | instrument |
| Sleeping Sun | Nightwish | | | 4:45 | instrument |
| Sleeping Sun | Nightwish | | | 4:36 | instrument |
| Sleepsong | Secret Garden | | | 4:51 | instrument |
| Sliabh Russel or Congress Jig / The Congress | Cathal Hayden, Paddy Keenan & Mark Simos | | | 3:10 | instrument |
| Slip Into Spring | Bill Whelan | | | 3:46 | instrument |
| Slip Jig: Gusty's Frolics | Brian McNamara | | | 2:52 | instrument |
| Slip Jigs: Hardiman the Fiddler / The Arra Mountains / Redican's Mother | Brian McNamara | | | 3:38 | instrument |
| Sliverish | Davy Spillane | | 3 | 2:54 | instrument |
| Smaointe… | Enya | | 3 | 6:08 | instrument |
| Soldier of Fortune | Blackmore’s Night | | | 3:53 | instrument |
| Soldier of Fortune | Blackmore’s Night | | | 4:32 | instrument (als “pipes”) |
| Something for Liam / Ten Million Gems | Nancy Kerr & James Fagan | | | 3:30 | instrument |
| Sona | Zedd feat. the olllam | | 1 | 3:08 | instrument |
| Song for a Stormy Night | Secret Garden & Steinar Albrigtsen | | | 4:16 | instrument |
| Song for Sorrow and Woe | Xandria | | 3 | 5:24 | instrument |
| Song of Myself | Nightwish | | | 7:18 | instrument |
| Song of Myself | Nightwish | | | 8:14 | instrument |
| Song of Myself | Nightwish | | 3 | 7:53 | instrument |
| Song of Winter | Rafael Pacha | | | 6:34 | instrument |
| Song of Yesterday | Black Country Communion | | 5 | 8:32 | instrument |
| Sonny | Emmylou Harris feat. Dolores Keane & Mary Black | | | 4:17 | instrument |
| Sonny | Emmylou Harris, Dolores Keane & Mary Black | | | 4:11 | instrument |
| Sons of Eisnech | Mychael Danna | | | 3:08 | instrument |
| Soulcrusher | Xandria | | 2.5 | 6:12 | instrument |
| Spanish Nights | Blackmore’s Night | | | 6:01 | instrument (als “pipes”) |
