Steppenwolf (originally Der Steppenwolf) is the tenth novel by German-Swiss author Hermann Hesse.

Originally published in Germany in 1927, it was first translated into English in 1929. Combining autobiographical and psychoanalytic elements, the novel was named after the German name for the steppe wolf. The story in large part reflects a profound crisis in Hesse's spiritual world during the 1920s while memorably portraying the protagonist's split between his humanity and his wolf-like aggression and homelessness.

Steppenwolf was wildly popular and has been a perpetual success across the decades, but Hesse later asserted that the book was largely misunderstood.