Berlin Alexanderplatz is a 1929 novel by Alfred Döblin. It is considered one of the most important and innovative works of the Weimar Republic. In a 2002 poll of 100 noted writers, the book was named among the top 100 books of all time.

Bruno Alfred Döblin was a German novelist, essayist, and doctor, best known for his novel Berlin Alexanderplatz (1929). A prolific writer whose œuvre spans more than half a century and a wide variety of literary movements and styles, Döblin is one of the most important figures of German literary modernism. His complete works comprise over a dozen novels ranging in genre from historical novels to science fiction to novels about the modern metropolis; several dramas, radio plays, and screenplays; a true crime story; a travel account; two book-length philosophical treatises; scores of essays on politics, religion, art, and society; and numerous letters—his complete works, republished by Deutscher Taschenbuch Verlag and Fischer Verlag, span more than thirty volumes. His first published novel, Die drei Sprünge des Wang-lung, appeared in 1915 and his final novel, Hamlet oder Die lange Nacht nimmt ein Ende was published in 1956, one year before his death.