- Saint Patrick's
- Saint Patrick's / Relaxation Sounds of Nature Relaxing Guitar Music Specialists
- Sally Maer
- Sally Oldfield
- Salsa Celtica
- Sam Reid
- Samantha Marais
- Samantha Star Mermaid Music
- Sandy Brechin
- Sandy Denny
- Sangsters
- Santec Music Orchestra
- Saoirse
- Saor Patrol
- Sarah Bauhan
- Sarah Keane
- Sarah Marie Mullen
- Sarah Masen
- Sarah's Harfe
- Sarah-Jane Summers
- Sasha MacKenzie
- Sashqxxx
- Sat-Chit
- Savourna Stevenson
- SCAL'PxSCAL'DA
- Scan Tester
- Scarlet Rivera
- Scots Guards
- Scott & Maria
- Scottish Fiddlers' Group
- Scottish National Pipe & Drum Corps and Military Band
- Scottish Pipe Band
- Scottish Power Pipe Band
- Scottish Thunder
- Scythian
- Seamus Brett
- Seamus Byrne
- Seamus Egan
- Seamus Ennis
- Seamus Heaney
- Seamus McGuire
- Seamus Moore
- Seamus O'Muineachain
- Seamus Tansey
- Sean Doyle
- Sean Dunphy
- Sean Keane
- Sean Maguire
- Sean McGuire
- Sean Nua
- Sean O'Brian
- Sean Quinn Band
- Sean Schafianski
- Sean Smyth
- Sean Talamh
- Sean Tyrrell
- Searson
- Sedrenn
- Seelie Court
- Seelyhoo
- Seltic Family
- Seoirse O'Dochartaigh
- Serge Clemens
- Sergio Pommerening
- Sergy el Som
- Serin
- Serundal
- Seumas MacNeill
- Seven Nations
- Seán Keane
- Seán Tyrrell
- Seána
- Shadygrove
- Shai No Shai
- Shamrock
- Shamrock & Thistle
- Shamrog
- Shane Cook
- Shane MacGowan
- Shane MacGowan & The Popes
- Shannon
- Shannon Castle Singers
- Shannon, Celtic folk-rock band
- Sharon Kennedy
- Sharon Shannon
- Sharon Shannon & Friends
- Sharon Shannon and the RTE Orchestra
- Shaun Davey
- Shaun Erik
- Sheeban Celtic Band
- Sheena Wellington
- Sheila Ryan
- Sheila Walsh
- Shelley Phillips
- Shelta
- Shenanigan
- Shilelagh Law
- Shishonnah
- Shonemat Jafarkhonov
- Shooglenifty
- Short Notice
- Shotts & Dykehead Caledonia Pipe Band
- Shuna
- Shura Gehrman
- Sido Islwyn
- Sileas
- Silly Sisters
- Silly Wizard
- Simon Cooper
- Simon Fox
- Simon Fraser University Pipe Band
- Simon McDonnell
- Simon Thoumire
- Simon Thoumire Three
- Simone Alves & Yann Gourvil
- Sinead O' Connor
- Sinead Stone
- Sineag MacIntyre
- Sinéad Clover
- Sinéad Lohan
- Sinéad O'Connor
- Siobhan Armstrong
- Siobhan McDonnell
- Sir Harry Lauder
- Sissel
- SiX!AM
- SixAM
- Skaliero
- Skeduz
- Skerryvore
- Skin & Bone
- Skipinnish
- Skolvan
- Skye Consort
- Skyedance
- Skylark
- Slainte
- Slainte Mhath
- Sleego
- Sleeping Babies Songs
- Smalltalk
- Smithfield Fair
- Sogni Celtici
- Soig Siberil
- Solas
- Soldat Louis
- Sole
- Solenn Lefeuvre
- SON AR DAN
- Son Ha Koroll
- Son Hoang
- Sonar Cantando
- Sonas
- Sonerien Du
- Songs To Your Eyes
- Sonic World Orchestra
- SORC'HENN
- Sorcha Ní Ghuairim
- SORC'HENN
- Sorcha Ní Ghuairim
- Sottofondo Musicale Maestro
- Soul Path
- Sounds of the Earth
- Soy Chosen
- Spa Music Spa
- Spailpin
- Spark Skylark
- Spectacular Sound Productions
- Spielleute Skadefryd
- SpinalFusion
- Spinfield
- Spontus
- Sr. Sider
- St Patricks Parade
- St. Laurence O'Toole Pipe Band
- St. Paddy Players
- St. Patrick's Day
- St. Paul's Cathedral Choir
- Stanley Holloway
- Startijenn
- Stefan Ibach
- Stefano Principini
- Stefano Torossi
- Stello
- STETRICE
- Stevan Vincendeau
- Steve Baughman
- Steve Benbow
- Steve Fisher
- Steve Hogarty
- Steve Lynch
- Steve McDonald
- Steve Schuch
- Steve Tilston
- Steve Tilston & Maggie Boyle
- Steve Wickham
- Steven Bodenes
- Steven MacÌomhair
- Stevie Lawrence
- Stockton's Wing
- Stocktons Wing
- Stolen Notes
- Stone Age
- Stonehaven Pipe Band
- Storvan
- Straight Furrow
- Strathclyde University Chamber Choir
- Strathisla
- Stravaig
- Stress Out
- String Sisters
- String Theory
- Stringer Folk
- Strobinell
- Stuart Anthony
- Stuart Anthony & Steve Hall
- Sue
- Sue Music Inc
- Sue Richards
- Sugo Music Artists
- Sunshine Sound
- Superbelle
- Susan McKeown
- Susana Seivane
- Sussie Nielsen
- SVETY
- Sweekar Agasthi
- Sweeney's Men
- Sweeny's Men
- Swåp
- Sydney Devine
- São Patrício do Norte
- Säckpipor
- Säkkipilli
- Sækkepiber
- Séamus McGuire