| Artist | Year at the Gathering |
| Kaos Anubis | 2017 |
| Karnage | 2013 |
| Kayla K | 2012 |
| Kazkit | 2006 |
| Kegan The Creep Ass | 2013, 2014, 2015, 2018 |
| Kesto | 2012 |
| Kid Crusher | 2008 |
| Kid N Play | 2021 |
| Killa Kat | 2006 |
| Killa-C | 2007 |
| Killah Priest | 2003 |
| KillFuck | 2007 |
| Killjoy Club | 2016, 2018 |
| King 810 | 2015, 2021 |
| King Gordy | 2006, 2007, 2008, 2009, 2010, 2011, 2012 |
| King Irish | 2017 |
| King Iso | 2018 |
| King Krimson | 2013 |
| Kingspade | 2018, 2019 |
| Kissing Candice | 2016, 2017, 2018 |
| Kittie | 2011 |
| Klepto | 2007 |
| Klokwerk E | 2021 |
| Knowledge Da MC | 2019, 2021 |
| Konspiracy Kamp | 2018 |
| Kool Keith | 2012 |
| Kottonmough Kings | 2000, 2003, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 |
| Krak Rok | 2013 |
| Krazy Kidz | 2006 |
| Kreaper | 2006 |
| Krizz Kaliko | 2013 |
| KRS-One | 2019, 2022 |
| Kryptik | 2006, 2007, 2008 |
| Kung Fu Vampire | 2010, 2011, 2013, 2016, 2017, 2019 |
| Kurupt | 2004 |
