- K-Aus
- K. Fedeux
- Kad
- Kafe Koefet
- Kairrav Dulera
- Kaleb Thrones
- Kansan Celts
- Karan Casey
- Karaoke Kings
- Karen Ashbrook
- Karen Ashbrook & Paul Oorts
- Karen Matheson
- Karen Russell
- Karen Tweed
- Karine Polwart
- Karl Denver
- Karl Jenkins
- Karliene
- Karushanti
- Kasír
- Kate Crossan
- Kate Rusby
- Katerina Garcia
- Kathleen Collins
- Kathleen MacInnes
- Kathryn Tickell
- Katia
- Katie's Randy Cat
- Katka Garcia
- Katka García
- Katrien Delavier
- Katy Adelson
- Keane
- Keenailis
- Keily's Folk
- Keith Duke
- Keith Halligan
- Keith Johnston
- Keith Lockhart
- Kelora
- Kelpie
- Keltania
- Keltic Scent
- KelticDead
- Keltikon
- Keltische Musik Band
- Kenneth Bowen
- Kenneth McKellar
- Kepelledro
- Kernunna
- Kerstin Blodig
- Kervegan's
- Kevin Blandford
- Kevin Burke
- Kevin Burke & Mícheál Ó Domhnaill
- Kevin Burke and Jackie Daly
- Kevin Burke's Open House
- Kevin Conneff
- Kevin Crawford
- Kevin Kearney
- Kevin MacLeod
- Kevin MacLeod & Alec Finn
- Kevin McDermott Orchestra
- Kevin Mitchell
- Kevrenn Alre
- Khartoum Heroes
- Kieran Fahy
- Kieran Goss
- Kilfenora Céilí Band
- Kilfenora Fiddle Ceili Band
- Kilkenny Band
- Killarney Singers
- Killian's Angels
- Kim Robertson
- Kimberley Fraser
- Kings Own Scottish Borderers
- Kinnell
- Kinross & District Pipe Band
- Kips Bay
- Kips Bay Ceili Band
- Kiran Young Wimberly
- Kirk James
- Kirk MacNeil
- Kirkintilloch Band
- Kirkmount
- Kirsten Easdale
- Kittel & Co.
- Konogan an Habask
- Kornog
- Kosb
- Koun
- Kreiz Breizh Akademi
- Kris Drever
- Kristian
- Kristian og Jesper
- Krêo Fidélis
- Kyle Carey
- Kyle Pickard
- Kíla