| McKintosh, Peter, | Peter McKintosh | Designer | 2003 – 2007 | 4 | |
| McKinven, Neil | Neil McKinven | Actor | 2010 | 2 | 2 |
| McKitrick, Charlie | Charlie McKitrick | Actor | 2012 | 1 | |
| McKnight, Betsy Elizabeth Ann | Betsy Elizabeth Ann McKnight | Actor, Mask Maker | 2004 – 2005 | 2 | |
| McKnight, Brian | Brian McKnight | Actor | 2000 | 1 | |
| McKnight, Nancy | Nancy McKnight | Actor | 1931 | 1 | |
| McKoy, Butch | Butch McKoy | Composer | 2018 – 2019 | 11 | |
| McLain, Heath | Heath McLain | Designer | 2008 | 1 | |
| McLain, John | John McLain | Lighting Designer | 1973 | 1 | |
| McLain, Zach | Zach McLain | Actor | 2008 | 1 | |
| McLane , Derek | Derek McLane | Designer | 1992 | 1 | |
| McLaren, C. | C. McLaren | Conductor | 1917 | 1 | |
| McLaren, Graham | Graham McLaren | Designer, Director | 2004 – 2013 | 18 | |
| McLaren, Robert | Robert McLaren | Director, Lighting Designer | 2006 | 6 | |
| McLarnon, Patrick | Patrick McLarnon | Actor | 1961 | 1 | |
| McLaughlin, Caitriona | Caitriona McLaughlin | Director | 2011 | 1 | |
| McLaughlin, Ellen | Ellen McLaughlin | Actor | 2004 | 1 | |
| McLaughlin, Jack | Jack McLaughlin | Actor | 1978 | 1 | |
| McLaughlin, Robin | Robin McLaughlin | Costume Designer | 2004 | 1 | |
| McLaughlin, William | William McLaughlin | Actor | 1959 | 3 | |
| McLay, Fiona | Fiona McLay | Actor | 1984 | 1 | |
| McLean, Carrie | Carrie McLean | Actor | 2000 | 1 | |
| McLean, J.C., | J. C. McLean (J.C. McLean) | Actor | 1909 | 2 | |
| McLean, Kara | Kara McLean | Actor | 2004 | 1 | |
| McLean, Lorna | Lorna McLean | Actor, Choreographer | 1930 | 2 | |
| McLean, Scott | Scott McLean | Director | 1936 | 2 | |
| McLeish, Kenneth | Kenneth McLeish | Adaptation, Translator | 1990 – 2017 | 35 | |
| McLellan, Kenny | Kenny McLellan | Designer | 2014 – 2015 | 2 | |
| McLendon, Errol | Errol McLendon | Actor | 2009 | 1 | |
| McLenigan, Jered | Jered McLenigan | Actor | 2005 | 1 | |
| McLeod, Alison | Alison McLeod | Sound Designer | 2009 | 1 | |
| McLeod, Marion | Marion McLeod | Actor | 1962 | 1 | |
| McLeod, Stephen | Stephen McLeod | Actor | 2011 | 1 | |
| McLoud, Donald | Donald McLoud | Actor | 1925 – 1926 | 2 | |
| McLoughlin, Brian | Brian McLoughlin | Lighting Designer | 1993 | 1 | |
| McLoughlin, Eleanor | Eleanor McLoughlin | Actor | 2019 | 1 | |
| McLusky, Graham | Graham McLusky | Lighting Designer | 1981 | 1 | |
| McMahen, Marshall | Marshall McMahen | Designer | 2011 | 1 | |
| McMahon, Brendan | Brendan McMahon | Actor | 2012 | 1 | |
| McMahon, Charles | Charles McMahon | Actor, Director | 1999 – 2005 | 2 | |
| McMahon, Erin | Erin McMahon | Actor | 2013 | 1 | |
| McMahon, Glenn, | Glenn McMahon | Actor | 1923 | 1 | |
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