Has anyone won the newbery and caldecott medal in same year?

No, no one has ever won the Newbery and Caldecott Medals in the same year. The Newbery Medal is awarded to the most outstanding American children's book of the year, while the Caldecott Medal is awarded to the most distinguished American picture book for children. The two medals are awarded by the American Library Association, but they are not given to the same person in the same year.