An earring is a piece of jewelry that is worn on the ear. They are worn by both genders, although until recently in western cultures, they were more typically worn by women.

Earrings are attached to the ear through a piercing in the earlobe or some other external part of the ear, except in the case of a clip earring, which clips onto the lobe. Common locations other than the earlobe for piercings include the rook, tragus, or across the helix. The simple term "ear piercing" usually refers to an earlobe piercing, whereas piercings in the upper part of the external ear are often referred to as "cartilage piercings." Cartilage piercings are more complex to perform than earlobe piercings, and take longer to heal.

Earring components can be made out of any number of materials, including metal, plastic, glass, precious stones and beads. Designs can range from small loops or studs to large plates or dangling items. The size is generally limited by the physical capacity of the earlobe to hold the earring without tearing. People who habitually wear heavy earrings may find that over time, the earlobe and piercing stretch.

Earrings are worn around the world in most cultures, both currently and historically. In many cultures, it is common to pierce the ears of young girls soon after birth. This has become somewhat controversial because of its involuntary nature. Although not as common as with females, ear piercing among males has also become popular in North America and Europe.