Doctor Allan Roy Dafoe (29 May, 1883 - 2 June, 1943) was a Canadian obstetrician, best known for delivering and caring for the Dionne Quintuplets, the first quintuplets known to survive early infancy.

Dafoe was born in Madoc, Ontario, the son of a physician.

At the start of 1909 he went into practice in Callander, Ontario , where he would reside the rest of his life.

On May 28, 1934 he was called in to aid the multiple birth of the Dionne family, and saw to the survival of the mother and all children. This got international press notice. He continued to help care for the children for years, and became something of a celebrity in the onslaught of media attention. The government of Ontario gave Dr. Dafoe joint guardianship of the Quintuplets. To help generate funds and in response to public interest, a special nursery was built for the children where the curious members of the public could pay to view them. This was generally approved of at the time, but later generated criticism for the sideshow atmosphere it produced.

Dr. Dafoe was awarded Order of the British Empire for his work with the Dionne Quintuplets.