Moyry Castle (from the Irish Maġ Rí or "plain of the king") is situated in County Armagh, Northern Ireland. It was built during the latter stages of the Nine Years' War in June 1601 by Lord Mountjoy to help secure Moyry Pass and the Gap of the North. It is set in the corner of a small bawn and is a small rectangular tower three storeys high. Moyry Castle is a State Care Historic Monument sited in the townland of Carrickbroad, in Newry, Mourne and Down District Council area, at grid ref: J0576 1466.