| McCartan, Simon | Simon McCartan | Actor | 2006 | 1 | 1 |
| McCarroll, Shannon | Shannon McCarroll | Actor | 2019 | 1 | |
| McCarroll, Mikyla | Mikyla McCarroll | Actor | 2019 | 1 | |
| McCardle, Helene | Helene McCardle | Actor | 2008 | 1 | |
| McCardle, Dillon | Dillon McCardle | Sound Designer | 2014 | 1 | |
| McCardie, Brian | Brian McCardie | Actor | 2013 - 2015 | 5 | |
| McCann, Reid | Reid McCann | Sound Designer | 2012 | 1 | |
| McCann, Donal | Donal McCann | Actor | 1993 | 1 | |
| McCann, Dennis | Dennis McCann | Actor | 2008 | 1 | |
| McCann, David | David McCann | Actor | 2004 - 2009 | 2 | |
| McCann, Christopher | Christopher McCann | Actor | 1984 - 2001 | 5 | |
| McCann, Chris | Chris McCann | Actor | 1975 | 1 | |
| McCann, Brian | Brian McCann | Actor | 2005 | 1 | |
| McCamus, Tom | Tom McCamus | Actor | 2005 | 1 | |
| McCalman, Macon | Macon McCalman | Actor | 1971 - 1973 | 5 | |
| McCallum, Sandy | Sandy McCallum | Actor | 1990 - 1999 | 3 | |
| McCallum, Paul | Paul McCallum (Paul McCallum) | Actor | 1970 | 3 | |
| McCallum, Nicholas | Nicholas McCallum | Actor | 1975 | 1 | |
| McCallum, Neil | Neil McCallum | Actor | 1955 - 1958 | 2 | |
| McCallum, Mary | Mary McCallum | Actor | 2004 | 1 | |
| McCallum, John | John McCallum | Actor | 1956 | 1 | |
| McCallum, Eileen | Eileen McCallum | Actor | 2005 | 6 | |
| McCallum, Douglas | Douglas McCallum | Actor | 1975 | 1 | |
| McCallum, David | David McCallum | Actor | 1988 | 1 | |
| McCallum, Bill | Bill McCallum | Actor | 2008 | 3 | |
| McCallops, Michael | Michael McCallops | Actor | 2011 | 12 | |
| McCall, Tom | Tom McCall | Musician | 1972 | 1 | |
| McCall, Nick | Nick McCall | Lighting Designer | 1993 - 1994 | 2 | |
| McCall, Kathleen | Kathleen McCall (Kathleen McCall) | Actor | 2002 | 1 | |
| McCall, Greg | Greg McCall | Musician | 1992 | 1 | |
| McCall, Brendan | Brendan McCall (Brendan McCall) | Actor, Director, Producer | 2009 - 2020 | 4 | |
| McCaig, Ian | Ian McCaig | Actor | 1969 | 1 | |
| McCaffrey, Sorcha | Sorcha McCaffrey | Actor | 2006 | 3 | |
| McCaffrey, Robin | Robin McCaffrey | Actor | 1984 | 1 | |
| McCaffrey, Meta | Meta McCaffrey | Actor | 1964 | 1 | |
| McCabe, Vincent | Vincent McCabe | Actor | 1980 - 2003 | 3 | |
| McCabe, Stephen | Stephen McCabe (Stephen McCabe) | Designer | 1983 | 1 | |
| McCabe, Benjamin | Benjamin McCabe | Actor | 1947 | 1 | |
| McCabe, Antonia Carillo | Antonia Carillo McCabe | Actor | 2000 | 1 | |
| McCabe, Antonia | Antonia McCabe | Actor | 1999 | 1 | |
| McBurney, Christine | Christine McBurney | Assistant Director, Director | 2017 - 2022 | 2 | |
| McBryde, Ryan | Ryan McBryde | Director | 2011 | 1 | |
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