Mountjoy

Mountjoy may refer to:

Places

 * Brockagh (also known as Mountjoy), a hamlet in County Tyrone in Northern Ireland
 * Mountjoy, Ontario, a neighbourhood in Timmins, Ontario, Canada
 * Mountjoy Castle, a castle in Magheralamfield, County Tyrone, Northern Ireland
 * Mountjoy Prison, a medium security prison in Dublin, Ireland opened in 1850
 * Mountjoy Square, a city square in Dublin
 * Mountjoy, a former barony of Ireland now known as Dungannon Upper
 * Mountjoy, the hill roughly 4 kilometers (2.5 miles) north of Jerusalem where the army of the First Crusade rejoiced upon getting their first glimpse of Jerusalem in June of 1099

Title

 * Baron Mountjoy, a hereditary title given to the men of two families
 * William Blount, 4th Baron Mountjoy (died 1534)
 * Charles Blount, 5th Baron Mountjoy (1516–1544)
 * Charles Blount, 1st Earl of Devonshire, Lord Mountjoy, Lord Deputy of Ireland

Surname

 * Celeste Mountjoy, Australian artist and illustrator
 * Dick Mountjoy (1932–2015), American politician from California
 * Doug Mountjoy (1942–2021), Welsh Snooker player
 * Eric W. Mountjoy (1931–2010), Canadian emeritus professor at McGill University
 * Penelope Mountjoy, archaeologist

Given name

 * Mountjoy Blount, 1st Earl of Newport (c. 1563–1606), illegitimate son of Charles Blount, 1st Earl of Devonshire

Fictional

 * Mountjoy (comics), a mutant in the Marvel Comics Universe
 * Mountjoy, the French herald in Shakespeare's Henry V

Ships

 * The Mountjoy was a merchant ship used to relieve the Siege of derry in Ulster in 1689. It was also the codename for the ship used in the 1914 Larne Gun Running.