Old Tom Gin is a variety of Gin that uses specific ingredients. A number of distillers now have a modern version of Old Tom Gin. This type of Gin was popular in the 18th century in England. In style Old Tom Gin is slightly sweeter than London Dry Gin but not as sweet as Dutch Jenever.

The name Old Tom Gin is supposed to derive from a sign, used to indicate an illicit establishment that supplied that Gin. The symbol was a wooden plaque shaped like a black cat.

Glasgow Distillery (Makar) produce an Old Tom Gin and from Gorilla Spirits there is Silverback Old Tom Gin.