Morgan Crofton (born 1826 in Dublin, Ireland, died in 1915 in Brighton, England) was a mathematician who contributed to the field of geometric probability theory. He also worked with James Joseph Sylvester and contributed an article in the Encyclopædia Britannica on probability. Crofton's formula is named in his honour.
As a person he was the child of Reverend William Crofton, but converted to the Roman Catholic Church in the 1850s in part due to an interest in Newman. This led to his resignation at Queen's College, Galway and transference to various Catholic colleges. Later his son became a priest.