A money bag is a bag normally used to hold and transport coins and banknotes, often closed with a drawstring. When transported between banks and other institutions, money bags are usually moved in armored cars or money trains. It is a type of currency packaging. Money bags are often portrayed in cartoons and other light popular culture.

A bag is a common tool in the form of a non-rigid container, typically made of cloth, leather, paper or plastic. The use of bags predates recorded history, with the earliest bags being lengths of animal skin, cotton, or woven plant fibers, folded up at the edges and secured in that shape with strings of the same material. Bags can be used to carry items such as personal belongings, groceries, and other objects. They comes in various shapes and sizes, often equipped with handles or straps for easier carrying.