Quoins are masonry blocks at the corner of a wall.
Quoin or Du Quoin may also refer to:
Places Quoin Bluff, Western Australia Quoin Hill Airfield, Vanuatu Du Quoin, Illinois, USA Du Quoin station Du Quoin State Fairgrounds DuQuoin State Fairgrounds Racetrack
Other Quoin (gunnery), a wedge used in aiming a cannon Quoin (printing), wooden or metal wedges or cam operated devices for locking printing type into a chase
See also Quoin Island (disambiguation)