NAME | CHARACTER | PLAY | YEAR |
| Maestas, Jeremiah M. | Billy Bibbitt | One Flew Over the Cuckoo's Nest | 2002 |
| Mahan, Colleen | Ceil Adams | And Miss Reardon Drinks A Little | 1999 |
| Maki, Peggy | | Our Town | 1982 |
| Maki, Peggy | | How the West was Fun | 1982 |
| Maki, Peggy | Ursula Greystone | How the West was Fun II | 1984 |
| Maki, Peggy | Grace Hoyland, diner owner | Bus Stop | 1986 |
| Maki, Peggy | Customer | Cactus Flower | 1987 |
| Maki, Margaret (Peggy) | Hiliary Birch | Spider's Web | 1989 |
| Maki, Peggy | Gerry Dunbar | Play On! | 1990 |
| Maki, Peggy | Bessie Clary | Laura | 1991 |
| Maki, Stan | | How the West was Fun | 1982 |
| Malloy, Mindy | Lady Larken | Once Upon A Mattress | 1989 |
| Marchand, Ron | Detective Lieutenant Al Mitchell | Speaking of Murder | 2001 |
| Mardon, Andrea | Vanessa | Play It Again Sam | 1996 |
| Marinshaw, Diana | Nancy | Angel Street | 1993 |
| Martin, Drew | | Closer Than Ever | 1999 |
| Martin, Mark | Pape | Breath of Spring | 2003 |
| Mash, Dionna | Dancer | Scrooge | 1998 |
| Massey, Laura | Blanche DuBois | A Streetcar Named Desire | 2007 |
| May, Bob | Riggs | Murder By Misadventure | 1996 |
| Mayer, Joanne G. | Alice Winter | White Sheep in the Family | 1987 |
| McAfee, Greg | Linus Larrabee, Jr. | Sabrina Fair | 2003 |
| McCafferty, Kathy | Pianist | Once Upon A Mattress | 1989 |
| McCartney, Joanna J. | Mrs. Pentrano | And Miss Reardon Drinks A Little | 1999 |
| McCartney, Joanna J. | Mom | True West | 2000 |
| McCarty, Tony | Fistful O' Cash | Green Valley Gusher Melodrama | 2006 |
| McCobb, Craig | Paul | Company | 2007 |
| McCrary, Diahann | Ruby Redd | Martinis 'n' Mistletoe: A Holiday Extravaganza! | 2007 |
| McCullock, James "Mike" | Aaron Jablonski | Invitation To A March | 2000 |
| McCullock, James M. | Ford Dolor | The Food Chain | 2001 |
| McCullock, James M. | Mark Dolson | Mass Appeal | 2002 |
| McCurry, Melissa | Flo | Not Even a Mouse | 1986 |
| McDade, Sean T. | Death | Death Takes A Holiday | 1990 |
| McDade, Sean | Henry | Outward Bound | 1991 |
| McEnnis | Millie | Melodrama | 2005 |
| McKenna, Kaly | Mrs. Pascal | The House of Yes | 2004 |
| McKenna, Kaly | "B" | Three Tall Women | 2004 |
| McKenna, Kaly | Persis | Let's Murder Marsha | 2006 |
| McKinley-Dietz, Terri | A Girl | Laura | 1991 |
| McKnight, Heather | Amy Lee | Laundry & Bourbon/Lonestar | 2000 |
| McLean, John | Farmer Tolliver | How The West Was Fun! | 1997 |
| McLean, John | Poker Player | How The West Was Fun! | 1997 |
| McNeill, Will | Samual Savage | The Curious Savage | 1994 |
| McPherson, Bill | | Our Town | 1982 |
| McWethy, Bryan | Butterfly | The Velveteen Rabbit | 1995 |
| McWethy, Myra Williams | Nanny | The Velveteen Rabbit | 1995 |
| McWethy, Myra Williams | Aunt Barbara | The Velveteen Rabbit | 1995 |
| Measel, Gwenda | Amanda Wingfield | The Glass Menagerie | 1999 |
| Meddows, Karen | | How the West was Fun | 1982 |
| Meddows, Karen | Essie Sycamore Carmichael | You Can't Take It With You | 1985 |
| Meddows, Karen | Understudy | Mousetrap | 1985 |
| Meddows, Georgene | Miss Brill | Cheaper By The Dozen | 1984 |
| Meddows, Georgene | Milly | How the West was Fun II | 1984 |
| Meddows, Georgene | Olga Katrina | You Can't Take It With You | 1985 |
| Meddows, Wayne | Ezra | How the West was Fun II | 1984 |
| Mendes, Mark Alan | John | Veronica's Room | 1999 |
| Mercurio, Beth | Mother | The Velveteen Rabbit | 1995 |
| Mercurio, Beth | Megan Wells/Maxine Stuart | 84, Charing Cross Road | 2001 |
| Mercurio, Beth | Marlene Turnover | Daddy's Dyin' Who's Got the Will? | 2001 |
| Mercurio, Elizabeth | Mrs. Mortar | The Children's Hour | 2003 |
| Mercurio, Beth | Nanny | The Effects Of Gamma Rays On Man-In-The-Moon Marigolds | 2005 |
| Mercurio, Sarah | Aunt Lucille | The Velveteen Rabbit | 1995 |
| Mercurio, Sarah | Wild Rabbit 2 | The Velveteen Rabbit | 1995 |
| Meredith, David | Man | Open All Night | 2000 |
| Meredith, David Blaise | Schuyler Grogan | Invitation To A March | 2000 |
| Meredith, David Blaise | Johnny Jelliwell | Springtime for Henry | 2001 |
| Meredith, David Blaise | Nat | New York Actor | 2001 |
| Meredith, David Blaise | Parker | Making the Call | 2001 |
| Meredith, David Blaise | Mark | Strangers on a Train | 2001 |
| Meredith, David Blaise | Harmony Rhodes | Daddy's Dyin' Who's Got the Will? | 2001 |
| Messer, Jeffifer | Dancer | Scrooge | 1998 |
| Mettler, Mandy | Anna | Old Times | 2001 |
| Metz, Rich | Bo Decker, rancher | Bus Stop | 1986 |
| Metz, Rich | Gooper | Cat On A Hot Tin Roof | 1988 |
| Michele, Susinne | Adventuress | Seven Keys To Baldpate | 1995 |
| Michele, Susinne | Jan Miller, an actress | Cahoots | 1995 |
| Millard, Jim | Wizard | Once Upon A Mattress | 1989 |
| Millard, Jim | Mark Lemon | A Christmas Carol | 1993 |
| Millard, Jim | Mr. Summey | Dark of the Moon | 1999 |
| Miller, Christopher | Scoop Rosenbaum | The Heidi Chronicles | 2004 |
| Miller, Christopher T. | Tony | Boy Gets Girl | 2006 |
| Miller, Gail | Christmas Yet to Come | A Christmas Carol | 1987 |
| Miller, Jeffery | Sammy | New York Actor | 2001 |
| Miller, Lois Jane | Charlotte | Beyond Therapy | 2006 |
| Miller, Sheila | Helen Potts | Picnic | 1992 |
| Miller, Sheila | Miss Marple | A Murder Is Announced | 1993 |
| Miller, Sheila | Mrs. Paddy | The Curious Savage | 1994 |
| Miller, Sheila | Clementine | To Grandmother's House We Go | 1995 |
| Miller, Sheila | Phyllis Montague | Sing On | 1996 |
| Miller, Sheila | Louisa Creed | Ladies In Retirement | 1996 |
| Miller, Sheila | Dame Beatrice Appleby | Breath of Spring | 2003 |
| Miller, Terril | Dr. Gladys Petrell | Tribute | 1998 |
| Miller Jr., David M. | Bob Stein | And Miss Reardon Drinks A Little | 1999 |
| Miyakawa, Antonio | Joe Scales | Cheaper By The Dozen | 1984 |
| Moaney, Lucinda | Christine | Picnic | 2004 |
| Moaney, Lucinda | Fran/Molly/Betsy/April | The Heidi Chronicles | 2004 |
| Moaney, Lucinda | E. J. Lofgren | Harvey | 2006 |
| Monroe, Mark | | Play On! | 1990 |
| Monzo, Peter | | How the West was Fun II | 1984 |
| Moorhead, Lori | Honey | Who's Afraid Of Virginia Woolf? | 1996 |
| Moretti, Marissa | Saloon Girl | How The West Was Fun! | 1997 |
| Morgentaler, Morris | Sheriff | The Trip To Bountiful | 1998 |
| Morreall, Sherrie | Lucy Gilham | Ladies In Retirement | 1996 |
| Morris, Danny | Augustus Greystone | How the West was Fun II | 1984 |
| Morris, Danny | Paul Sycamore | You Can't Take It With You | 1985 |
| Morris, Danny | Carl, bus driver | Bus Stop | 1986 |
| Morris, Danny | Mr. Robbins | Not Even a Mouse | 1986 |
| Morris, Danny | Everett Parker | Catch Me If You Can | 1987 |
| Morris, Danny | Scrooge | A Christmas Carol | 1987 |
| Morris, Danny | Ivan Strange | Reserve Two For Murder | 1988 |
| Morris, Danny | Rev. Canon Chasuble, D.D. | Importance Of Being Ernest | 1988 |
| Morris, Danny | Mark Lemon | A Christmas Carol | 1988 |
| Morris, Danny | CA. Governor Lambert de Catolica | Death Takes A Holiday | 1990 |
| Morris, Danny | Caretaker | Seven Keys To Baldpate | 1995 |
| Morris, Danny | Bartender Dan | How The West Was Fun! | 1997 |
| Mower, Anna | Emily Helmer | A Doll's House | 1992 |
| Mower, Cate | Martha Gregory | Reserve Two For Murder | 1988 |
| Mower, Cate | 1st Lady-In-Waiting Rowena | Once Upon A Mattress | 1989 |
| Mower, Jay | Henry Hailsham-Brown | Spider's Web | 1989 |
| Mower, Jay | Hennessey | Count Dracula | 1989 |
| Mower, Jay | Sergeant Mellors | A Murder Is Announced | 1993 |
| Mower, Jeffrey | Bob Helmer | A Doll's House | 1992 |
| Mullaney, Brian | Jeffrey | The Curious Savage | 1994 |
| Mullinger, Gordon R. | Jared | To Grandmother's House We Go | 1995 |
| Mullinger, Gordon R. | Mathew Treves | Towards Zero | 1995 |
| Mullinger, Gordon R. | Skin Horse | The Velveteen Rabbit | 1995 |
| Mundell, Peggy L. | Laura Warwick | The Unexpected Guest | 1997 |
| Murphy, Bill | Hoke | Night Watch | 2007 |
| Murphy, Bill | Doctor | A Streetcar Named Desire | 2007 |
| Murrell, Bob | Dr. Bradman | Blithe Spirit | 1986 |
| Murrell, Bob | Sam Jackson | White Sheep in the Family | 1987 |
| Murrell, Bob | Marshal Harry Strongbore | Melodrama | 2005 |
| Mutz, Gary | Roy | Early One Evening At The Rainbow Bar & Grille | 1998 |
| Myers, Al | Benjamin Rabinowitz | The Crowne of Ariadne | 2001 |
| Neely, Seth | Mark McPherson | Laura | 1991 |
| Neilsen, Peggy | Cecily Farr | 84, Charing Cross Road | 2001 |
| Neilsen, Peggy | Lurlene Turnover Rogers | Daddy's Dyin' Who's Got the Will? | 2001 |
| Neilsen, Peggy | Leah Felt | The Ride Down Mount Morgan | 2002 |
| Nelson, Christopher | Tom Fuller | The Lights Are Warm And Coloured | 1996 |
| Nesbitt, Christina | Elvira the Dancing Horse | How The West Was Fun! | 1997 |
| Netherton, Beth | Girl | 84, Charing Cross Road | 2001 |
| Netherton, Marcus C. | William Humphries | 84, Charing Cross Road | 2001 |
| Nguyen, Sally | Saloon Girl | How The West Was Fun! | 1997 |
| Nicholls, Bonnie | April | Company | 2007 |
| Nolan, Sean | Sir Studley | Once Upon A Mattress | 1989 |
| Oakley, Chad | Sound Effects Man | Hitch-Hiker & Wrong Number | 2006 |
| Nyhammer, Kari | Stephanie Dickinson | Cactus Flower | 1987 |
| O'Connor, Eileen | Computer Technician | Compost in the Machine | 2000 |
| O'Connor, Lindsey | Janice | The Effects Of Gamma Rays On Man-In-The-Moon Marigolds | 2005 |
| O'Driscoll, Patrick | Towns Person | The Foreigner | 1995 |
| O'Driscoll, Patrick | Captain (Toy Soldier) | The Velveteen Rabbit | 1995 |
| O'Driscoll, Patrick | Uncle George | The Velveteen Rabbit | 1995 |
| O'Fahy, Ben | Captain Lesgate | Dial M For Murder | 2002 |
| O'Fahy, Ben | Paul D'Argenson | Sabrina Fair | 2003 |
| O'Nan, Ryan | Joe Carden | The Children's Hour | 2003 |
| Ochoa, Elijah | Ebenezer Scrooge | Scrooge | 1998 |
| Ochoa, Kelli | Prudence | Beyond Therapy | 2006 |
| Oliver, Linda | Mrs. Cratchit | A Christmas Carol | 1987 |
| Oliwa, Dawn | Eileen | New York Actor | 2001 |
| Olson, Tim | Nil Krogstad | A Doll's House | 1992 |
| Olson, Timothy | Bobby Stack | So Long on Lonely Street | 1992 |
| Olson, Timothy | Miles Jarvis | The Swan Song | 1994 |
| Olson, Timothy | Paul | To Grandmother's House We Go | 1995 |
| Olson, Timothy R. | Corporal Clive Winton | See How They Run | 1997 |
| Oravec, Linda | Tonto | How the West was Fun | 1982 |
| Orner, Jonathan | Fred | Cheaper By The Dozen | 1984 |
| Orr, Kathleen | Mae | Cat On A Hot Tin Roof | 1988 |
| Orr, Linda Johnson | Elizabeth | Angel Street | 1993 |
| Orr, Linda | Suzzane | Dearly Departed | 1998 |
| Orr, Linda | Joy of Life Singer | Dearly Departed | 1998 |
| Orr, Russell | Gary Krager | The Swan Song | 1994 |
| Orr, Russell | The Bishop of Lax | See How The Run | 1997 |
| Ortega, Benjamin | Cratchit Boy | Scrooge | 1998 |
| Ortega, Christina | Ghost of Christmas Future | Scrooge | 1998 |
| Ortega, Luis | Jacob Marley | Scrooge | 1998 |
| Oulela, Dee | | How the West was Fun | 1982 |
| Owashi, Jordon | Little Indian | How The West Was Fun! | 1997 |
| Owens, Daryck | Rick | Not Even a Mouse | 1986 |
| Owens, Myche | P.G. | My Bare Lady | 1986 |
| Ownbey, Jillian | Jester | Once Upon A Mattress | 1989 |