| Author (number of quotes) | Description |
| Da |
| Dahl, Roald (1) | Norwegian-born English author |
| Dahlberg, Edward (4) | American author |
| Dahlbom, Bo (1) | Swedish philosopher, computer scientist and researcher |
| Dalberg-Acton, John (2) | English historian, politician, and writer |
| Dalton, John (1) | English physicist and chemist |
| Dangerfield, Rodney (8) | American comedian |
| Danzig, Tobias (1) | |
| Dare, Tessa (1) | Americal romance novelist |
| Darrow, Clarence (1) | American lawyer |
| Darwin, Charles (11) | English scientist |
| Darwin, Francis (1) | English botanist |
| Davidson, Craig (1) | Canadian author of short stories and novels |
| Davis, Belva (1) | American television and radio journalist |
| Davis, Bette (1) | stage name of Ruth Elizabeth Davis, American actress |
| Davis, Wade (2) | Colombian-Canadian anthropologist, ethnobotanist, and author |
| Davis, William (1) | English journalist |
| Dawkins, Richard (25) | British evolutionary biologist and author |
| De |
| de Broglie, Louis (1) | French physicist |
| de Geus, Arie (1) | Dutch businessman |
| De Niro, Robert (1) | American actor, producer, and director |
| De Vries, Peter (1) | American editor, novelist |
| Dean, James (1) | American actor |
| Dean, Jimmy Ray (1) | American singer, anchorman, actor and businessman |
| Dederich, Charles (1) | |
| Deffand, Madame Marie du (2) | French author |
| Degas, Edgar (1) | French painter, sculptor |
| DeGeneres, Ellen (3) | American comedian and actress |
| Delevingne, Cara (1) | English model |
| Delon, Alain (2) | French actor, director, producer |
| Democritus (4) | Ancient Greek philosopher |
| Dempsey, Patrick (1) | American actor and driver |
| Dennett, Daniel (47) | American philosopher |
| Denton, James (1) | American actor |
| Depp, Johnny (4) | American actor |
| DeRozan, DeMar (1) | American professional basketball player |
| Descartes, René (4) | French philosopher, mathematician |
| Deschanel, Emily (1) | American actress and producer |
| Dessen, Sarah (11) | American author |
| Deutch, Zoey (1) | American actress |
| Devlin, Keith (4) | British writer, mathematician |
| Di |
| Diamond, Jared (3) | American scientist and author |
| Dick, Philip K. (2) | |
| Dickens, Charles (15) | English author |
| Dickinson, Emily (8) | American poet |
| Diderot, Denis (3) | French philosopher |
| Diesel, Vin (1) | American actor, producer and screenwriter |
| Dietrich, Marlene (3) | German actress and singer |
| Dikkers, Scott (2) | American author and businessman |
| Dillahunty, Matt (1) | American atheist activist |
| Dillard, Annie (1) | American author |
| Diller, Phyllis (3) | American comedian |
| Dimnet, Ernest (1) | |
| Dior, Christian (1) | French fashion designer |
| Dirac, Paul (3) | English physicist |
| Disney, Walt (2) | American filmdirector and screenwriter |
| Disraeli, Benjamin (10) | English author and politician |
| Do |
| Dobson, James C. (1) | |
| Dobzhansky, Theodosius (2) | Russian-born American geneticist and evolutionary biologist |
| Donne, John (1) | English poet |
| Doren, Mark Van (1) | American writer, poet |
| Dostoyevsky, Fyodor (5) | |
| Dosztojevszkij, Fjodor Mihajlovics (3) | Russian author |
| Dotcom, Kim (4) | German-Finnish Internet entrepreneur |
| Douglas, Michael (2) | American actor and producer |
| Douglas, Norman (1) | English author |
| Downham, Jenny (1) | British novelist |
| Downs, Hugh (1) | American author, producer and TV personality |
| Doyle, Arthur Conan (18) | Scottish-born author |
| Dr |
| Drucker, Peter Ferdinand (1) | author |
| Drummond, William (1) | Scottish poet |
| Dryden, John (4) | English author, poet |
| Du |
| Duane, Diane (1) | American science fiction and fantasy author |
| Dugan, Ellen (1) | |
| Dumas, Alexandre (10) | French author |
| Duncan, Isadora (1) | |
| Dunne, Finley Peter (1) | American author and comedian |
| Durant, Kevin (1) | American basketball player |
| Durant, Will (1) | American author, historian, philosopher |
| Durrell, Gerald (4) | English zoologist and author |
| Dy |
| Dyer, Wayne (2) | American author |
| Dyer, Wayne W. (1) | American author |
| Dylan, Bob (5) | American musician and poet |