Hunger is a novel by the Norwegian author Knut Hamsun by P.G. Philipsens Forlag. The novel has been hailed as the literary opening of the 20th century and an outstanding example of modern, psychology-driven literature. Hunger portrays the irrationality of the human mind in an intriguing and sometimes humorous manner.

Written after Hamsun's return from an ill-fated tour of America, Hunger is loosely based on the author's own impoverished life before his breakthrough in 1890. Set in late 19th-century Kristiania (now Oslo), the novel recounts the adventures of a starving young man whose sense of reality is giving way to a delusionary existence on the darker side of a modern metropolis. While he vainly tries to maintain an outer shell of respectability, his mental and physical decay are recounted in detail.

The novel's first-person protagonist, an unnamed vagrant with intellectual leanings, probably in his late twenties, wanders the streets of Norway's capital, Kristiania (Oslo), in pursuit of nourishment. Over four episodes he meets a number of more or less mysterious persons, the most notable being Ylajali, a young woman with whom he engages in a mild degree of physical intimacy.

Hunger was first published in 1890. Translated by the writer and feminist George Egerton (pen name for Mary Chavelita Dunne Bright) in 1899. Hunger was adapted to film in 1966 and 2001. Audiobook read by Greg W., running time 6 hours, 45 min. Unabridged full version. Also available as E-Book.