Walter Champfleur or de Champfleur (died 1498 or 1499) was an Irish cleric and judge of the fifteenth century, who played a leading role in Irish politics. permitted the Abbot and his successors, as well as a number of other prominent clerics like the Prior of Great Connell Priory, to deal with their lands in territories controlled by the "enemies of the King" i.e. "the hostile Irish", without committing any crime. The Abbot and his successors were exempted from the usual penalties for having dealings with the Irish. They were specifically permitted to enter contracts for the sale of land and foodstuffs with them, "in time of war as well as peace", and in a rather curious detail, were allowed to act as godfathers to Irish children.
He was one of the founder members of the Dublin Baker's Guild, which received its charter in 1479. He collected the Earl's rents, stored money for him, and kept him informed of political developments in Dublin. In particular, while Parliament was in session, Champfleur on at least two occasions advised Ormond to have private bills drafted to secure his own interests, which the Earl duly did.
In 1497 Walter wrote inquiring about the health of Ormond's second wife Lora Berkeley, who was pregnant, and offering his prayers that "God send (her) a good and fair deliverance". The expected child was Lady Elizabeth Butler, who survived infancy but died in her early teens. On a more practical note, he suggested that one of his cousins would be a suitable tenant for the Earl's farm at Rush in north county Dublin, which was apparently in a ruinous condition. This is one of the few known references to Walter's family.
He is usually said to have died in 1497, but there is evidence that he was still alive in February 1498; he may have died later that year or in the following year. His death was a blow to Ormond, whose relations with the new Abbot of St Mary's, John Orum (previously one of the monks of the House), were very bad: Orum refused to hand over monies collected for Ormond by Champfleur, despite admitting that the funds in question were the Earl's property.
Champfleur was mourned by his monks and by the people of Dublin as an "aged, prudent and learned man", and a man of energy and initiative