Dungannon Castle was a castle located at Dungannon, County Tyrone, Northern Ireland. In 1305 a castle was built by Domnall O'Neill on what is today known as Castle Hill, one of the highest points in the area, which dominated the surrounding countryside with the ability to see seven counties depending on the weather. During the 15th century a tower house was known to be constructed upon the site. Conn Mor O'Niell was in residence during 1483, and in 1559 Shane O'Neill burnt the castle to prevent use by English forces. The O'Donnells demolished the castle in 1590. The castle was burned in 1594 and in 1602 by Hugh O'Neill, 2nd Earl of Tyrone as Crown forces under Charles Blount, Lord Mountjoy closed in on the Gaelic lords towards the end of the Nine Years' War. In 1607, ninety-nine Irish chie