Milk thief may refer to:
The Milk Thief, a 1998 book of poetry by Paul Henry Tilberi (AKA snakkur), a witches' familiar and milk thief in Icelandic folklore Troll cat (AKA milk rabbit, troll ball), a witches' familiar and milk thief in Scandinavian folklore
See also Catching the Milk Thief, an 1899 film by Bamforth & Co Ltd