Octocon is the national Irish science fiction, and has been running since 1990.
All of the previous Octocons are listed below. If you are interested in the current Octocon, please click here.
| Year | Convention | Location | Guest of Honour | Website | Programme Book |
|---|---|---|---|---|---|
| 1990 | Octocon | Royal Marine Hotel, Dun Laoghaire | Terry Pratchett | ||
| 1991 | Octocon 2 | Royal Marine Hotel, Dun Laoghaire | Geoff Ryman | ||
| 1992 | Octocon 3 | Royal Marine Hotel, Dun Laoghaire | Orson Scott Card | ||
| 1993 | Octocon 4 | Royal Marine Hotel, Dun Laoghaire | Storm Constantine | ||
| 1994 | Octocon 5 | Royal Marine Hotel, Dun Laoghaire | Robert Holdstock |  |
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| 1995 | Octocon 6 | Royal Marine Hotel, Dun Laoghaire | Kim Newman | ||
| 1996 | Octocon 7 | Royal Marine Hotel, Dun Laoghaire | Brian Stableford | ||
| 1997 | Octocon 8: Eurocon | Dublin Castle | Harry Harrison | 1997.octocon.com | |
| 1998 | Octocon Lite | Royal Marine Hotel, Dun Laoghaire | James White | ||
| 1999 | Octocon X | Royal Marine Hotel, Dun Laoghaire | Robert Rankin | 1999.octocon.com | |
| 2000 | O2K | Royal Dublin Hotel, O'Connell Street | Michael Marshall Smith | 2000.octocon.com | |
| 2001 | Octocon 2001 | Royal Marine Hotel, Dun Laoghaire | Anne McCaffrey | 2001.octocon.com | |
| 2002 | Octocon 2002 | China Miéville | |||
| 2003 | No Octocon due to They Came and Shaved Us | ||||
| 2004 | Octocon 2004 | Glenroyal Hotel, Maynooth | Tanith Lee | ||
| 2005 | Octocon 2005 | Glenroyal Hotel, Maynooth | Charles Stross | ||
| 2006 | Octocon 2006 | Glenroyal Hotel, Maynooth | JG Jones | ||
| 2007 | Octocon 2007 | Glenroyal Hotel, Maynooth | Alastair Reynolds | ||
| 2008 | Octocon 2008 | Royal Dublin Hotel, O'Connell Street | Ken MacLeod | ||
| 2009 | Octocon 2009 | Camden Court Hotel, Dublin 2 | Mike Carey Fan GoH: Dave Lally | ||
| 2010 | Octocon 2010 | Camden Court Hotel, Dublin 2 | George R. R. Martin | ||
| 2011 | Octocon 2011 | Camden Court Hotel, Dublin 2 | John Higgins | ||
| 2012 | Octocon 2012 | Camden Court Hotel, Dublin 2 | Gail Simone Richard Morgan | 2012.octocon.com | |
| 2013 | Octocon 2013 | Camden Court Hotel, Dublin 2 | Richard K. Morgan Gail Simone | 2013.octocon.com | |
| 2014 | No Octocon due to Shamrokon/Eurocon | ||||
| 2015 | Octocon 2015 | Camden Court Hotel, Dublin 2 | |||
| 2016 | Octocon 2016 | Camden Court Hotel, Dublin 2 | Rhianna Pratchett Diane Duane Peter Morwood | 2016.octocon.com | |
| 2017 | Octocon 2017 | Camden Court Hotel, Dublin 2 | Dan Abnett Nik Vincent Abnett | 2017.octocon.com | |
| 2018 | Octocon 2018 | Pat Cadigan | 2018.octocon.com |