| Author (number of quotes) | Description |
| Pa |
| Pacino, Al (2) | stage name of Alfredo James Pacino, American actor |
| Padalecki, Jared (1) | American actor |
| Page, Jimmy (1) | English musician, composer |
| Pagels, Douglas (1) | American author |
| Paine, Thomas (6) | English-American author and politician |
| Palahniuk, Chuck (53) | American author |
| Paltrow, Gwyneth (1) | American actress and singer |
| Panati, Charles (1) | |
| Panin, Ivan (1) | |
| Paolini, Christopher (13) | American author |
| Parcells, Bill (1) | American futball coach |
| Parelli, Pat (1) | |
| Pariser, Eli (26) | American author, political and internet activist |
| Park, Robert (1) | American sociologist |
| Parker, Charlie (1) | American jazz saxophonist and composer |
| Parker, Dorothy (1) | American author, poet |
| Parker, Gilbert (1) | Canadian-born English author and politician |
| Parker, Sarah Jessica (2) | American actress and producer |
| Parkinson, Catrina De Jong (1) | |
| Parkinson, Cyril Northcote (1) | English historian |
| Parsons, Paul (1) | American writer, journalist |
| Parton, Dolly (1) | American singer, actress |
| Pascal, Blaise (3) | French mathematician, physicist |
| Pasternak, Boris (1) | |
| Pasternak, Boris Leonidovich (1) | |
| Patrick, Cat (1) | American author |
| Patterson, James (6) | American author |
| Pattinson, Robert (1) | English-born actor, modell, musician |
| Patton, George Smith (2) | American general |
| Pauling, Linus (2) | American chemist |
| Paulos, John Allen (1) | American mathematician |
| Pausch, Randy (4) | American professor of computer science |
| Payne, Liam (1) | English singer |
| Pe |
| Peale, Norman Vincent (1) | Writer and clergyman |
| Pearsall Smith, Logan (1) | American author |
| Peiffer, Vera (4) | German author and psychotherapeutist |
| Penn, William (1) | |
| Penrose, Roger (3) | English mathematician and physicist |
| Perreira, Gilbert S. (1) | |
| Perri, Christina (2) | American singer and songwriter |
| Pessoa, Fernando (2) | Portuguese poet |
| Petőfi, Sándor (11) | Hungarian poet, revolutionist |
| Peter, Laurence J. (2) | American educator |
| Petty, Tom (2) | American singer and songwriter |
| Pf |
| Pfeiffer, Michelle (1) | American actress and producer |
| Ph |
| Philips, Emo (2) | American comedian |
| Pi |
| Piaget, Jean (1) | Swiss psychologist |
| Picasso, Pablo (7) | Spanish painter and sculptor |
| Picoult, Jodi (21) | American author |
| Pierce, Edith Lovejoy (1) | English-American poet |
| Piercy, Marge (1) | American poet, author, and activist |
| Pike, Albert (1) | American lawyer, author, soldier |
| Pilgrim, Peace (1) | American activist |
| Pine, Albert (1) | American author |
| Pinero, Arthur Wing (1) | English actor, author and director |
| Pinker, Steven (9) | Canadian-American psychologist |
| Pinter, Harold (1) | English screenwriter, director and actor |
| Piper, John (1) | American Christian preacher and author |
| Pissarro, Camille (1) | Danish-French Impressionist and Neo-Impressionist painter |
| Pitt, Brad (1) | American actor and producer |
| Pl |
| Planck, Max (2) | German physicist |
| Plath, Sylvia (3) | American author and poet |
| Plato (5) | |
| Plutarch (1) | |
| Po |
| Po, Huang (1) | Chinese Zen master |
| Poe, Edgar Allan (11) | American author, poet |
| Pohl, Frederick (1) | full name Frederik George Pohl, Jr., American science fiction writer and editor |
| Poincaré, Henri (8) | French mathematician, physicist and philosopher |
| Poisson, Siméon (1) | French mathematician |
| Pollock, Channing (1) | American playwright, criticist |
| Polybius (1) | |
| Pope, Alexander (5) | English poet |
| Popper, John (1) | American musician |
| Popper, Karl (2) | Austrian philosopher |
| Porchia, Antonio (3) | |
| Portman, Natalie (1) | American actress |
| Potts, Rolf (5) | American travel writer |
| Pound, Ezra (2) | American poet |
| Pr |
| Pratchett, Terry (42) | English author |
| Presley, Elvis (1) | American singer and actor |
| Presley, Elvis Aaron (2) | American musician and actor |
| Prochnow, Herbert V. (1) | American banking executive |
| Pross, Addy (1) | chemicist |
| Prost, Alain (1) | French racing driver |
| Proust, Marcel (5) | French author, criticist |
| Pruitt, Lonnie (1) | |
| Pu |
| Purdy, Ashley (3) | American singer |
| Puzo, Mario Gianluigi (1) | American author |
| Py |
| Pythagoras (1) | |