Dayrell Eardley Montague Crackanthorpe, CMG (1871 – 1950) was a British diplomat.
In 1914, Crackanthorpe was in charge of the British legation at Belgrade at the time of the assassination of Archduke Franz Ferdinand.
He was British Minister to the Central American Republics from 1919 to 1922, but did not proceed to post.
He was the brother of the writer Hubert Crackanthorpe.