He was killed in action at the Battle of the Sambre a week before the war ended. In a moment of ghastly irony, the telegram from the War Office announcing his death was delivered to his mother's home as her town's church bells were ringing in celebration of the Armistice.

Wilfred Owen was born the eldest of four children in Plas Wilmot; a house near Oswestry in Shropshire on 18 March 1893, of mixed English and Welsh ancestry. At that time, his parents, Thomas and Susan Owen, lived in a comfortable house owned by his grandfather, but, on his death in 1897, the family was forced to move to lodgings in the back streets of Birkenhead. He was educated at the Birkenhead Institute and at Shrewsbury Technical School (now The Wakeman School), and discovered his vocation in 1903 or 1904 during a holiday spent in Cheshire. Owen was raised as an Anglican of the evangelical school, and in his youth was a devout believer, in part due to his strong relationship with his mother, which was to last throughout his life. His early influences included the 'big six' of romantic poetry, particularly John Keats, and, as with many other writers of the time, the Bible.

Shortly after leaving school in 1911, Owen passed the matriculation exam for the University of London, but not with the first-class honours needed for a scholarship (his studies suffered as Owen mourned the loss of his uncle and role model, Edgar Hilton, to a hunting accident) which in his family's circumstances were the only way he could afford to attend.

In return for free lodging, and some tuition for the entrance exam, Owen worked as lay assistant to the Vicar of Dunsden near Reading and as a pupil-teacher at Wyle Cop School. He then attended classes at University College, Reading (now the University of Reading), in botany and later, at the urging of the head of the English Department free lessons in Old English. His time spent at Dunsden parish led him to disillusionment with the church, both in its ceremony and its lack of aid for those in need.

Prior to the outbreak of World War I, he worked as a private tutor teaching English and French at the Berlitz School of Languages in Bordeaux, France. There he met the older French poet Laurent Tailhade, with whom he later corresponded in French.

On 21 October 1915, he enlisted in the Artists' Rifles Officers' Training Corps. For the next seven months, he trained at Hare Hall Camp in Essex. On 4 June 1916 he was commissioned as a second lieutenant (on probation) in The Manchester Regiment. Owen started the war as a cheerful and optimistic man, but he soon changed forever. Initially, he held his troops in contempt for their loutish behaviour, and wrote to his mother calling his company "expressionless lumps". However, Owen's outlook on the war was to be changed dramatically after two traumatic experiences. Firstly, he was blown high into the air by a trench mortar, landing in the remains of a fellow officer. Soon after, he became trapped for days in an old German dugout. After these two events, Owen was diagnosed as suffering from shell shock and sent to Craiglockhart War Hospital in Edinburgh for treatment. It was whilst recuperating at Craiglockhart that he was to meet fellow poet Siegfried Sassoon, an encounter which was to transform Owen's life.

After a period of convalescence in Scotland, then a short spell working as a teacher in nearby Tynecastle High School, he returned to light regimental duties. In March 1918, he was posted to the Northern Command Depot at Ripon. A number of poems were composed in Ripon, including "Futility" and "Strange Meeting". His 25th birthday was spent quietly in Ripon Cathedral.

After returning to the front, Owen led units of the Second Manchesters on 1 October 1918 to storm a number of enemy strong points near the village of Joncourt. However, only one week before the end of the war, whilst attempting to traverse a canal, he was shot in the head by an enemy rifle and was killed. The news of his death, on 4 November 1918, was to be given to his mother on Armistice Day. For his courage and leadership in the Joncourt action, he was awarded the Military Cross, an award which he had always sought in order to justify himself as a war poet, but the award was not gazetted until 15 February 1919. The citation followed on 30 July 1919:

For conspicuous gallantry and devotion to duty in the attack on the Fonsomme Line on October lst/2nd, 1918. On the company commander becoming a casualty, he assumed command and showed fine leadership and resisted a heavy counter-attack. He personally manipulated a captured enemy machine gun from an isolated position and inflicted considerable losses on the enemy. Throughout he behaved most gallantly.

Owen is regarded by historians as the leading poet of the First World War, known for his war poetry on the horrors of trench and gas warfare. He had been writing poetry for some years before the war, himself dating his poetic beginnings to a stay at Broxton by the Hill, when he was ten years old. The Romantic poets Keats and P.B. Shelley influenced much of Owen's early writing and poetry. His great friend, the poet Siegfried Sassoon later had a profound effect on Owen's poetic voice, and Owen's most famous poems ("Dulce et Decorum Est" and "Anthem for Doomed Youth") show direct results of Sassoon's influence. The novel Regeneration by Pat Barker shows this relationship closely. Manuscript copies of the poems survive, annotated in Sassoon's handwriting. Owen's poetry would eventually be more widely acclaimed than that of his mentor. While his use of pararhyme, with its heavy reliance on consonance, was innovative, he was not the only poet at the time to use these particular techniques. He was, however, one of the first to experiment with it extensively.