The townland of Mountnorris was historically called
Aghnecranagh and
Aghenecranagh (). In 1600
Lord Mountjoy built an earthwork fort and left a garrison of 400 men under the command of Captain
Edward Blaney in Mountnorris. The area took its name by combining the names of Mountjoy and his campaign commander in the
Low Countries, Sir John Norris. By 1620, the village no longer had a garrison and in the 18th century passed into the hands of the Cope family of
Loughgall, to become a rural settlement with no military connections. The village was the originally intended site of the
Royal School but due to instability at the time in Ulster, the school was resituated to its current site in Armagh and was opened in 1608. On 31 May 1991, during "
The Troubles", the
Provisional IRA carried out a large
truck bomb attack against the
British Army (
Ulster Defence Regiment) base at nearby Glenanne. It killed three soldiers and wounded another ten. It is often called the "
Glenanne barracks bombing". ==Climate==