All Guest appearance recordings:
- 1961-1989
- The Waters Of Tyne: 1961 - Prestige International 13059 LP — Isla Cameron - w/Louis Killen
- Stottin' Doon The Waall: 1962 - Topic TOP78 EP — Johnny Handle – Louis Killen: Producer
- The World of Folk Music, Starring Oscar Brand: 1963 - Show #66 — Oscar Brand - w/CBTM
- The World of Folk Music, Starring Oscar Brand: 1964 - Show #143 — Oscar Brand - w/CBTM
- Alex Campbell: 1965 - Transatlantic XTRA 1014 LP — Alex Campbell - w/Louis Killen
- Won't You Go My Way?: 1971 - Argo AFB 37 — Peter Bellamy - w/Louis Killen
- True Stories: 1973 - Elektra EKS 75053 LP — Judy Collins - w/Louis Killen
- Both Sides Then: 1979 - Topic 12TS400 LP — Peter Bellamy - w/Louis Killen
- Raise Your Weary Hearts: 1980 - Gransha Records 38606 LP — Seamus Kennedy - w/Tom Clancy (album notes)
- Uncommon Bonds: 1984 - Green Linnet SIF 1053 LP — Mick Moloney - w/Paddy, & Bobby Clancy & Robbie O'Connell
- Old Folks Ain't All the Same: 1987 - Collector COLL01942 LP — Joe Glazer - w/Louis Killen
- Up and In: 1988 (original release, reissue 2005 - Silverwolf) — Dave Guard - w/Tommy Makem
- Words and Music: 1989 - Shanachie 53010 CD — Phil Coulter - w/Liam Clancy
- 1990-1999
- A Touch of Tranquility: 1992 - Shanachie 53010 CD — Phil Coulter - w/Liam Clancy
- Whistle on the Wind: 1994 - Green Linnet 1142 CD — Joanie Madden - w/Liam Clancy
- On the Rocks: 1995 - Red Biddy 2001 CD — The Makem Brothers - w/Tommy Makem
- Another Chapter: 1996 — CS Records CS9601 CD — Arranmore - w/Tommy Makem
- New Day Dawning: 1996 - Green Linnet (40)1175 CD — Cherish the Ladies - w/Robbie O'Connell
- A Hundred Years Ago: 1998 - Helvic HLV 2003 CD — Warp Four - w/Liam Clancy, Robbie O'Connell, Dónal Clancy
- Irish Ballads & Songs of the Sea: 1998 - Folk Legacy CD-124 CD — Dan Miler - w/Louis Killen
- The Old Fireside Music: 1998 - Larraga LR 093098 CD — Mike & Mary Rafferty - w/Dónal Clancy
- At Home: 1999 - RCA Victor 63377 CD — Cherish the Ladies - w/Liam, Bobby, Dónal & Finbarr Clancy
- A 20th Anniversary Party: 1999 - Outer Green 8942 CD — Schooner Fare - w/Tommy Makem
- Wake the Vaulted Echoes: 1999 - Free Reed FRTCD 14 3 CD — Peter Bellamy - w/Louis Killen
- The Christmas Album: 1999 - Oasis/Barratone 99057 0003-2 — Barra MacNeils - w/Tommy Makem
- 2000-present
- The Girls Wont Leave the Boys Alone: 2001 - Windham Hill 11583 CD — Cherish the Ladies - w/Liam, Bobby, Aoife, Dónal & Finbarr Clancy & Tommy Makem
- The Road from Ballinakill: 2001 - Larraga MMR 112000 CD — Mike & Mary Rafferty - w/Dónal Clancy
- Silvery Moon: 2001 - Appleseed Records 1065 CD — Aoife Clancy - w/Bobby & Dónal Clancy
- Treasures from the Folk Den: 2001 - Appleseed Records 1046 CD — Roger McGuinn - w/Tommy Makem
- The Acoustic Folk Box: 2002 - Topic TSFCD 4001 4 CD — 1 - Louis Killen track, singing harmonies with Peter Bellamy
- All Things Considered: 2002 - Shanachie 78049 CD — Danú - w/Liam Clancy
- Hotel deVille: 2002 - Mountainside (?) CD — Dave Hawkins - w/Aoife Clancy
- Hand Me Downs: 2002 - Larraga TR 1103 CD — Mary Rafferty - w/Dónal Clancy
- Just One Wish: 2002 - Shanachie 78051 CD — Win Horan - w/Dónal Clancy
- Dearga: 2003 - Eats Records ESL 004 CD — Matt & Shannon Heaton - w/Aoife Clancy
- Speed 78: 2004 - Larraga MOR1302 CD — Mike Rafferty - w/Dónal Clancy
- Kind Letters: 2005 - Topic 553 CD — Martin Simpson - w/Dónal Clancy
- Serenade: 2005 - Compass 4416 CD — Mick McAuley & Winifred Horan - w/Dónal Clancy
- McNally's Row of Flats: 2006 - Compass 4426 CD — Mick Moloney - w/Robbie O'Connell
- Reunion: A Decade Of Solas: 2006 - Compass 4431 CD — Solas - w/Dónal Clancy
- Christmas Album II: 2006 - Barra Music Canada BMC 20061 — Barra MacNeils - w/Tommy Makem
- The New Broom: 2009 - RM-CD1 CD — Willie Kelly & Mike Rafferty - w/Dónal Clancy
- Irish Pirate Ballads and Other Songs of the Sea: 2009 - Smithsonian/Folkways SFW40553 CD — Dan Milner - w/Robbie O'Connell
Notes
Special thanks to Bill Jantz and Sean Cogan for contributing information on these pages.