The ring finger is the fourth proximal digit of the human hand, and the second most ulnar finger, located between the middle finger and the little finger. It is also called digitus medicinalis, the fourth finger, digitus annularis, digitus quartus, or digitus IV in anatomy. It may also be referred to as the third finger.

A ring is a round band, usually in metal, worn as an ornamental Jewellery around the finger, or sometimes the toe; it is the most common current meaning of the word "". Strictly speaking a normal ring is a finger ring (which may be hyphenated); other types of rings worn as ornaments are earrings, bracelets for the wrist, armlets or arm rings, toe rings and torc or neck rings, but except perhaps for toe rings, the plain term "ring" is not normally used to refer to these.