| Author (number of quotes) | Description |
| Ma |
| M. Barrie, James (1) | Scottish author and dramatist |
| MacArthur, Douglas (1) | American general |
| Macaulay, Thomas Babington (2) | English politician and author |
| MacDonald, George (1) | Scottish author and poet |
| Machiavelli, Niccolo (1) | Italian author and politician |
| Mackay, Harvey (4) | American businessman |
| MacKinnon, Rebecca (1) | American author |
| Maclaine, Shirley (1) | American actress |
| Macmillan, Maurice Harold (1) | English politician |
| Madách, Imre (8) | Hungarian author |
| Madison, James (2) | |
| Madonna (3) | stage name of Madonna Louise Ciccone, Italian-born American singer, actress |
| Maeterlinck, Maurice (2) | Belgian playwright, poet, and essayist |
| Maguire, Gregory (2) | American author |
| Mailer, Norman (2) | American author |
| Maistre, Joseph de (1) | Savoyard philosopher |
| Malik, Zayn (5) | stage name of Zain Jawadd Malik, English singer |
| Maltz, Maxwell (1) | American cosmetic surgeon and author |
| Mandela, Nelson (7) | President of South Africa |
| Mandelbrot, Benoit (1) | Polish-born, French-American mathematician |
| Mann, Thomas (1) | German author |
| Mannes, Marya (1) | pen name of Maria von Heimburg Mannes, American author and criticist |
| Manson, Charles (1) | American criminal |
| Manson, Marilyn (6) | American musician |
| Mantle, Mickey (1) | American baseball player |
| Maraboli, Steve (74) | American motivational speaker and author |
| Márai, Sándor (10) | Hungarian author |
| Marceau, Sophie (1) | French actress |
| Marchetta, Melina (1) | Australian writer and teacher |
| Marden, Orison Swett (1) | American author |
| Marley, Bob (7) | Jamaican singer, songwriter and musician |
| Márquez, Gabriel Garcia (1) | Columbian author, activist |
| Marquis, Don (3) | full name Donald Robert Perry Marquis, American comedian and author |
| Marr, Melissa (3) | American author |
| Mars, Bruno (1) | stage name of Peter Gene Hernandez, American singer, songwriter and producer |
| Marshall, Peter (2) | English author |
| Martel, Yann (4) | |
| Martin, Dean (1) | American singer, comedian and producer |
| Martin, George R. R. (5) | American novelist, screenwriter, and television producer |
| Martin, Steve (2) | American actor, comedian, author, producer, musician |
| Marx, Chico (1) | American actor |
| Marx, Groucho (3) | American actor and comedian |
| Mathewson, Christy (1) | American baseball player |
| Maugham, William Somerset (4) | English author |
| Mauriac, Francois (1) | French author |
| Maurois, Andre (1) | French author, historian |
| May, Rollo (1) | American psychologist |
| Mayr, Ernst (1) | German-American evolutional biologist |
| Mc |
| McAdams, Rachel (1) | Canadian actress |
| McCabe, Charles (1) | American journalist |
| McCaffrey, Anne (1) | |
| McCarthy, Cormac (1) | American author |
| McCarthy, John (1) | American computer scientist |
| McCartney, Paul (1) | English musician |
| McCay, James T. (1) | American author |
| McConaughey, Matthew (1) | American actor |
| McCourt, Malachy (1) | Irish-American actor, author and politician |
| McCranie, Stephen (1) | American cartoonist and illustrator |
| McEwan, Ian (1) | English author |
| McGregor, Conor (2) | Irish martial artist |
| McKay, David Oman (1) | American religious leader and educator |
| Mckinnon, Dan (1) | |
| McLaughlin, Mignon (1) | American author and journalist |
| McLeod, Bobby (1) | Australian activist, poet and musician |
| McLuhan, Marshall (3) | Canadian philosopher |
| Me |
| Meacham, Merle L. (1) | American psychologist and teacher |
| Mead, Margaret (1) | |
| Mead, Richelle (5) | American author |
| Medawar, Peter (2) | Brazilian-English biologist |
| Meester, Leighton (2) | American actress, singer and model |
| Meister, Eckhart (1) | German theologian, philosopher |
| Meltzer, Bernard C. (2) | American radio host |
| Mencken, Henry Louis (12) | American author, criticist |
| Menninger, Karl Augustus (1) | American psychiatrist |
| Mercury, Freddie (1) | English musician, singer of the Queen |
| Meri, Lennart Georg (1) | Estonian-born author, director, politician |
| Merton, Robert K. (1) | American sociologist |
| Meyer, Joyce (1) | pen name of Pauline Joyce Hutchison Meyer, American author and speaker |
| Meyer, Stephenie (29) | American author |
| Meyers, Ernest (1) | Australian poet |
| Mi |
| Michael, George (1) | stage name of Georgios-Kyriacos Panayiotou, Greek -born English singer |
| Michener, James A. (1) | American author |
| Mijamoto Sigeru (1) | Japanese video game director and producer |
| Mill, John Stuart (2) | English philosopher |
| Miller, Donald (2) | American author and public speaker |
| Miller, Henry (1) | American author and painter |
| Milligan, Spike (1) | Irish-born author, poet, comedian, musician |
| Milne, A. A. (2) | |
| Milton, John (3) | English poet, politician |
| Mirren, Helen (2) | American actress |
| Mitchell, Margaret (1) | American author |
| Mizner, Wilson (2) | American playwright |
| Ml |
| Mlodinow, Leonard (4) | American physicist, author and screenwriter |
| Mo |
| Monet, Claude (2) | French painter |
| Moning, Karen Marie (1) | American author |
| Monroe, James (1) | American statesman |
| Monroe, Marilyn (28) | American singer and actress |
| Montagu, Elizabeth (1) | English-born author |
| Montague, Charles Edward (1) | |
| Montaigne, Michel de (6) | French philosopher |
| Montgomery, Lucy Maud (3) | Canadian author |
| Moody, Dwight Lyman (1) | American clergyman |
| Moore, Christopher (9) | American author |
| Moore, Demi (1) | American actress |
| Moore, George (1) | Irish-born author and poet |
| Moore, Roger (1) | English actor and producer |
| Moore, Shemar (2) | American actor and model |
| Morgenstern, Christian (1) | German author and poet |
| Morley, Christopher (3) | American journalist, author and poet |
| Morris, William (1) | English artist, writer |
| Morrison, Jennifer (3) | American actress, model and producer |
| Morrison, Jim (7) | American singer, author, poet, director |
| Mortman, Doris (1) | American author |
| Mott, Nevill Francis (1) | English physicist |
| Moynihan, Daniel Patrick (1) | American politician, sociologist |
| Mu |
| Mueller, George (1) | |
| Muir, John (1) | Scottish-born American scientist and author |
| Mumford, Lewis (1) | American historian, philosopher of science |
| Murakami, Haruki (14) | Japanese author and translator |
| My |
| Myers, Walter Dean (1) | |
| Myss, Caroline (1) | American author |