Edmund I or Eadmund I was King of the English from 27 October 939 until his death. He was the elder son of King Edward the Elder and his third wife, Queen Eadgifu, and a grandson of King Alfred the Great. After Edward died in 924, he was succeeded by his eldest son, Edmund's half-brother Æthelstan. Edmund was crowned after Æthelstan died childless in 939. He had two sons, Eadwig and Edgar, by his first wife Ælfgifu, and none by his second wife Æthelflæd. His sons were young children when he was killed in a brawl with an outlaw at Pucklechurch in Gloucestershire, and he was succeeded by his younger brother Eadred, who died in 955 and was followed by Edmund's sons in succession.

Ælfgifu of Shaftesbury was the first wife of King Edmund I. She was Queen of the English from her marriage in around 939 until her death in 944. Ælfgifu and Edmund were the parents of two future English kings, Eadwig and Edgar. Like her mother Wynflaed, Ælfgifu had a close and special if unknown connection with the royal nunnery of Shaftesbury (Dorset), founded by King Alfred, where she was buried and soon revered as a saint. According to a pre-Conquest tradition from Winchester, her feast day is 18 May.