Johannes Vilhelm Jensen (in Denmark always called Johannes V. Jensen; 20 January 1873 – 25 November 1950) was a Danish author, often considered the first great Danish writer of the 20th century. He was awarded the Nobel Prize in Literature in 1944. One of his sisters, Thit Jensen, was also a well-known writer and a very vocal, and occasionally controversial, early feminist.

He was born in Farsø, a village in North Jutland, Denmark, as the son of a veterinary surgeon and he grew up in a rural environment. While studying medicine at the University of Copenhagen he worked as a writer to fund his studies. After 3 years of studying he chose to change careers and devote himself fully to literature.

The first phase of his work as an author was influenced by fin-de-siècle pessimism.

His career began with the publication of Himmerland Stories (1898–1910), comprising a series of tales set in the part of Denmark where he was born. During 1900 and 1901 he wrote his first masterpiece, Kongens Fald (eng. transl. 1933 The Fall of the King), a modern historical novel centred around King Christian II and his characteristically Danish hesitancy and failure to act.
In 1906 Jensen created his greatest literary achievement: the collection of verses Digte 1906 (i.e. Poems 1906), which introduced the prose poem to Danish literature. He also wrote poetry, a few plays, and many essays, chiefly on anthropology and the philosophy of evolution.

He developed his theories of evolution in a cycle of six novels, Den lange rejse (1908–22), translated into English as The Long Journey (1923–24), which was published in a two-volume edition in 1938. This is often considered his main work in prose, a daring and often impressive attempt to create a Darwinian alternative to the Biblical Genesis myth. In this work we see the development of mankind from the Ice Age to the times of Columbus, focusing on pioneering individuals.
Like his compatriot Hans Christian Andersen, he travelled extensively; a trip to the United States inspired a poem of his, "Paa Memphis Station" [At the train station, Memphis, Tennessee], which is well known in Denmark. Walt Whitman was among the writers who influenced Jensen.

For many years he worked in journalism, writing articles and chronicles for the daily press without ever joining the staff of any newspaper.

Jensen was a controversial figure in Danish cultural life. He was a reckless polemicist and his often dubious racial theories have damaged his reputation. However, he never showed any Fascist leanings.
Today Jensen is still considered the father of Danish modernism, particularly in the area of modern poetry with his introduction of the prose poem and his use of a direct and straightforward language. His direct influence was felt as late as the 1960s. Without being a Danish answer to Kipling, Hamsun or Sandburg, he bears comparison to all three authors. He combines the outlook of the regional writer with the view of the modern academic and scientific observer. In 1999 The Fall of the King was acclaimed as the best Danish novel of the 20th century

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Johannes Vilhelm Jensen was born in the small village of Farsø, Himmerland, in North Jutland. He was the second son of the district veterinary surgeon, Hans Jensen, a descendant on both sides of farmers and craftsmen, and Marie (Kirstine) Jensen. Jensen was taught by his mother until the age of eleven. Under the influence of his father, he developed a fasciation for Darwinism, which became the cornerstone of his thinking. Jensen graduated from the Cathedral School of Viborg in 1893, and subsequently studied medicine at the University of Copenhagen from 1893 to 1898. In 1904 he married Else Marie Ulrik; they had three sons

لا يعرف شيء عن والديه ولا متى ماتا. والدته علمته حتى سن الحادية عشرة. عاش مع عائلته في قرية صغيرة. درس في وقت لاحق في المدرسة.

مجهول الطفولة.