Cartomancy is a form of fortune-telling or divination using a deck of cards. The practice of cartomancy has been observed since playing cards first came into use in Europe in the 14th century.

Practitioners of cartomancy are generally known as cartomancers, card readers or, simply, readers. Some practitioners have claimed that cartomancy's origins date back to ancient Egyptian times, the art being derived from wisdom given to the ancient Egyptians by the scribe-god Thoth, although this belief is by no means common today.

According to some traditions, a deck that is used for cartomancy should not be used for any other purpose. Cartomancers generally feel that the deck should be treated as a tool and cared for accordingly. Some cartomancers also feel that the cards should never be touched by anyone other than their owner.