| Author (number of quotes) | Description |
| Ra |
| R. Gordon, Dane (1) | |
| Radnóti, Miklós (5) | Hungarian poet |
| Ram Dass, Baba (1) | pen name of Richard Alpert, American spiritual teacher |
| Ramsey, Dave (1) | American businessman and author |
| Rand, Ayn (8) | Russian-born American author and philosopher |
| Randi, James (4) | Canadian-American stage magician, skeptic |
| Rapace, Noomi (1) | Swedish actress |
| Rathbone, Basil (1) | South Africa-born English actor |
| Raymo, Chet (1) | American writer, educator |
| Re |
| Reagan, Ronald (1) | the 40th President of the United States |
| Rees, Martin (2) | British cosmologist and astrophysicist |
| Reeves, Hubert (1) | French Canadian astrophysicist |
| Renan, Ernest (1) | French philosopher |
| Renard, Jules (3) | French author |
| Rényi, Alfréd (1) | Hungarian mathematician |
| Reznor, Michael Trent (2) | American musician, singer and producer |
| Ri |
| Ricci, Christina (1) | American actress |
| Rice, Anne (9) | American author |
| Richards, Johnathan (2) | former Federal prison inmate, author |
| Richter, Jean Paul (3) | |
| Rickman, Alan (2) | English actor |
| Ricotti, Sonia (1) | Canadian author and motivational speaker |
| Ridley, Matt (5) | English journalist, author, businessman |
| Rilke, Rainer Maria (3) | Austrian poet |
| Rimbaud, Arthur (1) | French poet |
| Riordan, Rick (7) | |
| Ritchie, Dennis MacAlistair (2) | American computer scientist |
| Ritchie, Guy (1) | English screenwriter and movie maker |
| Ro |
| Roache, Linus (1) | English actor |
| Robbie, Margot (1) | Australian actress |
| Robbins, Anthony (2) | American author |
| Robbins, Tom (2) | American author |
| Robbins, Tony (1) | American author and motivational speaker |
| Roberts, Gregory David (1) | Australian author |
| Roberts, Nora (1) | American author |
| Robinson, Brooks (1) | American baseball player |
| Robinson, Jackie (1) | American baseball player |
| Rochefoucauld, Francois de La (2) | French author |
| Roddick, Anita (1) | British businesswoman |
| Rodriguez, Michelle (1) | American actress |
| Rodriguez, Paul (2) | Mexican-born American actor |
| Rogers, Carl (1) | American psychologist |
| Rogers, Kenny (1) | American singer, actor |
| Rogers, Will (2) | American comedian, actor |
| Rohn, Jim (3) | |
| Rommel, Erwin (1) | German general and military theorist |
| Ronaldo, Cristiano (1) | Portuguese footballer |
| Rooney, Andy (6) | |
| Roosevelt, Eleanor (16) | American politician |
| Roosevelt, Franklin Delano (3) | the 32nd President of the United States |
| Roosevelt, Theodore (10) | the 26th President of the United States |
| Rossetti, Christina (1) | English poet |
| Rossetti, Christina Georgina (1) | English poet |
| Rossi, Valentino (1) | Italian motorcycle road racer |
| Rostand, Jean (1) | |
| Rosten, Leo (1) | Russian teacher, humorist |
| Roth, Veronica (2) | American author |
| Rothfuss, Patrick (1) | |
| Rouda, Kaira (1) | American writer |
| Rousseau, Jean-Jacques (4) | French philosopher, author and composer |
| Roux, Joseph (1) | French poet |
| Rovelli, Carlo (20) | Italian physicist and author |
| Rowland, Helen (2) | American comedian and journalist |
| Rowling, J. K. (9) | English author |
| Royal, Darrell (1) | American football player and coach |
| Ru |
| Rubbia, Carlo (1) | Italian physicist |
| Rubin, Gretchen (3) | American author and lawyer |
| Rubin, Harriet (1) | American writer |
| Rudner, Rita (4) | American author and comedian |
| Rumsfeld, Donald (1) | American politician and businessman |
| Runbeck, Margaret Lee (2) | American author |
| Rupp, Joyce (1) | American author and psychologist |
| Rushdie, Salman (1) | British Indian novelist and essayist |
| Rushkoff, Douglas (1) | |
| Ruskin, John (2) | English art critic |
| Russell, Bertrand (31) | English mathematician, philosopher |
| Russell, Keri (1) | American actress |
| Russell, Kurt (1) | American actor |
| Ruth, Babe (1) | American baseball player |
| Ry |
| Ryan, Carrie (1) | American author |
| Ryder, Winona (2) | American actress and producer |