| McCracken, Alice | Alice McCracken | Actor | 1963 | 1 | |
| McCracken, Dave | Dave McCracken | Adaptation | 2005 | 1 | |
| McCracken, Everett | Everett McCracken (Everett McCracken) | Composer | 1928 | 2 | |
| McCrae, Katherine | Katherine McCrae | Director | 2019 | 3 | |
| McCrann, Michael | Michael McCrann | Actor | 1993 | 1 | |
| McCready, Kelly | Kelly McCready | Director, Sound Designer | 2016 | 2 | |
| McCreery, Helen | Helen McCreery | Actor | 1921 | 1 | |
| McCreery, Helen | Helen McCreery | Actor | 2005 | 1 | |
| McCreery, Marina | Marina McCreery | Actor | 1997 | 1 | |
| McCrohan, Conor | Conor McCrohan | Assistant Director, Composer | 2016 | 2 | |
| McCrory, Helen | Helen McCrory | Actor | 2008 | 1 | |
| McCullagh, Jack | Jack McCullagh | Designer | 1968 | 1 | |
| McCulloch, Arthur | Arthur McCulloch | Actor | 1907 - 1910 | 10 | |
| McCulloch, Kate | Kate McCulloch | Actor | 1999 | 2 | |
| McCullough, Douglas | Douglas McCullough | Designer | 1978 | 1 | |
| McCullough, Patrick | Patrick McCullough | Actor | 1968 | 1 | |
| McCullough, Patrick S. | Patrick S. McCullough | Actor | 2000 | 1 | |
| McCullough, Sarah | Sarah McCullough | Actor | 2001 | 1 | |
| McCullough, Sherry | Sherry McCullough | Actor | 1959 | 1 | |
| McCullough, Zak | Zak McCullough | Actor | 2013 | 1 | |
| McCune, Jason | Jason McCune | Actor | 2005 | 4 | |
| McCunn, Amelia | Amelia McCunn | Actor | 2012 | 1 | |
| McCurdy, Charles | Charles McCurdy | Actor | 2010 | 1 | |
| McCurdy, Lisa | Lisa McCurdy | Actor | 2013 | 1 | |
| Mccurdy, Molly | Molly Mccurdy | Dramaturg | 2007 | 1 | |
| McCurdy, Tim | Tim McCurdy | Actor | 1984 | 3 | |
| McCurty, Patricia | Patricia McCurty (Patricia McCurty) | Actor | 2003 | 1 | |
| McCusker, Frank | Frank McCusker | Actor | 2003 | 1 | |
| McCusker, Stella | Stella McCusker | Actor | 1982 - 2003 | 4 | |
| McDade, Sandy | Sandy McDade | Actor | 1990 | 2 | |
| McDaniel, Scott | Scott McDaniel | Actor | 1971 | 1 | |
| McDanold, Jenna | Jenna McDanold | Lighting Designer | 2004 | 1 | |
| McDermid, Finlay | Finlay McDermid | Actor | 1928 - 1929 | 3 | |
| McDermott, Carolyn | Carolyn McDermott | Actor | 1993 | 1 | |
| McDermott, Chris | Chris McDermott | Actor | 1969 | 3 | |
| McDermott, Gerard | Gerard McDermott | Actor | 2011 | 2 | |
| McDermott, John | John McDermott | Designer | 2011 - 2022 | 2 | |
| McDermott, Lisè | Lisè McDermott | Actor | 1986 | 1 | |
| McDermottroe, Maria | Maria McDermottroe | Actor | 1984 | 1 | |
| McDevitt, Lorna | Lorna McDevitt | Actor | 2005 | 6 | |
| McDiarmid, Ian | Ian McDiarmid (Ian McDiarmid) | Actor | 1980 - 2011 | 4 | |
| McDonagh, Seán | Seán McDonagh | Actor | 2017 - 2020 | 2 | |
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