| Artist | Year at the Gathering |
| P Win | 2014 |
| P.O.D. | 2012, 2017 |
| P.R.E.A.C.H. | 2017, 2018, 2019 |
| Pain | 2010 |
| Paradime | 2009 |
| Paris | 2011 |
| Pauly Shore | 2009 |
Percybones |
2024 |
| Perpetual Hype Engine | 2000 |
| Peter Jackson | 2011 |
| Pimp On Wheels (P.O.W.) | 2007, 2010, 2012, 2013, 2014 |
| Pixy | 2013 |
| Playaz Lounge Crew (PLC) | 2005, 2006, 2007, 2008, 2009 |
| Playboy Tha Beast | 2015 |
| Poe Whosaine | 2011, 2012, 2013 |
| Poets | 2018 |
| Point 2 Point | 2007 |
| Political Assassin | 2012 |
| Polizicize | 2022 |
| Pony Boy | 2012 |
Posezur |
2024 |
| PostmorteM | 2006 |
| Potluck | 2006, 2011, 2012, 2013, 2015 |
| Pound The Pavement | 2018 |
| Powerglove | 2008 |
| Powerman 5000 | 2005 |
| Prescription RX | 2011 |
| Prescrxption | 2013 |
| Primer 55 | 2002, 2008 |
| Problemattik | 2019, 2021 |
| Prof | 2017 |
| Professor Fresh | 2022 |
| Project :Deadman | 2006 |
| Project Assassins | 2010 |
| Project Born | 2000, 2007, 2009, 2011, 2012, 2013, 2016, 2021 |
| Project Pat | 2012 |
| Property 6 | 2009 |
| Prozak | 2007, 2009, 2010, 2011, 2012 |
| Psycho Jesus | 2006, 2007, 2011 |
| Psycho Realm | 2013 |
| Psychopathic Rydas | 2000, 2001, 2002, 2004, 2006, 2007, 2009, 2010, 2011, 2012, 2013, 2014, 2015 |
| Psychosick | 2010, 2017 |
| Psych-Ward | 2007 |
Psyko Circus |
2024 |
| Puddle of Mudd | 2015 |
| Purple Hearts | 2018 |
