| McLay, Fiona | Fiona McLay | Actor | 1984 | 1 | |
| McLaughlin, William | William McLaughlin | Actor | 1959 | 3 | |
| McLaughlin, Robin | Robin McLaughlin | Costume Designer | 2004 | 1 | |
| McLaughlin, Kat | Kat McLaughlin | Designer | 2022 | 1 | |
| McLaughlin, Jack | Jack McLaughlin | Actor | 1978 | 1 | |
| McLaughlin, Ellen | Ellen McLaughlin | Actor | 2004 | 1 | |
| McLaughlin, Caitriona | Caitriona McLaughlin | Director | 2011 | 1 | |
| McLarnon, Patrick | Patrick McLarnon | Actor | 1961 | 1 | |
| McLaren, Robert | Robert McLaren | Director, Lighting Designer | 2006 - 2010 | 6 | |
| McLaren, Graham | Graham McLaren | Designer, Director | 2004 - 2013 | 18 | |
| McLaren, C. | C. McLaren | Conductor | 1917 | 1 | |
| McLane, Derek | Derek McLane | Designer | 1992 | 1 | |
| McLain, Zach | Zach McLain | Actor | 2008 | 1 | |
| McLain, John | John McLain | Lighting Designer | 1973 | 1 | |
| McLain, Heath | Heath McLain | Designer | 2008 | 1 | |
| McKoy, Butch | Butch McKoy | Composer | 2018 - 2021 | 20 | |
| McKowen, Margaret A. | Margaret A. McKowen | Costume Designer | 2004 | 1 | |
| McKnight, Nancy | Nancy McKnight | Actor | 1931 | 1 | |
| McKnight, Brian | Brian McKnight | Actor | 2000 | 1 | |
| McKnight, Betsy Elizabeth Ann | Betsy Elizabeth Ann McKnight | Actor, Mask Maker | 2004 | 2 | |
| McKitrick, Charlie | Charlie McKitrick | Actor | 2012 | 1 | |
| Mckissick, Ellie | Ellie Mckissick | Director | 2024 | 1 | |
| McKinven, Neil | Neil McKinven | Actor | 2010 - 2021 | 6 | 2 |
| McKintosh, Peter | Peter McKintosh | Designer | 2003 - 2007 | 4 | 1 |
| McKinnon, Kelley | Kelley McKinnon | Actor | 2001 | 1 | |
| McKinney, William, L. | William L. McKinney | Director | 1964 | 1 | 1 |
| McKinney, Shyanne | Shyanne McKinney | Actor | 2006 | 1 | |
| McKinney, George | George McKinney | Designer | 1956 | 1 | |
| McKinney, Duane | Duane McKinney | Actor | 1934 | 1 | |
| McKinney, Alisha | Alisha McKinney | Actor | 1994 - 2002 | 2 | |
| McKinnel, Norman | Norman McKinnel | Actor | 1902 - 1920 | 3 | 1 |
| McKim, Robert | Robert McKim | Actor | 1907 | 1 | |
| McKillop, Ann | Ann McKillop | Actor | 2004 | 1 | |
| McKey, Susan | Susan McKey | Actor | 1998 - 2011 | 3 | 1 |
| McKey, Rich | Rich McKey | Actor | 2004 | 1 | |
| McKern, Leo | Leo McKern | Actor | 1962 - 1988 | 3 | 1 |
| McKereghan, William | William McKereghan | Actor | 1971 | 1 | |
| McKereghan, Kevin | Kevin McKereghan | Actor | 1971 | 1 | |
| McKereghan, Dan | Dan McKereghan | Adaptation, Director | 1997 | 2 | 1 |
| McKeown, Fintan | Fintan McKeown | Actor | 1980 - 2010 | 2 | |
| McKeown, Archie | Archie McKeown | Director | 2018 | 1 | |
| McKeowen, Elizabeth | Elizabeth McKeowen | Actor | 1950 | 1 | |
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