Brownlow House, also known as Brownlow Castle and Lurgan Castle, is a Grade A listed 19th century house located in Lurgan, Northern Ireland. It was built for Irish politician Charles Brownlow, 1st Baron Lurgan in 1833 by Scottish architect William Henry Playfair     

The house was constructed in 1833 by Scottish architect William Henry Playfair for Charles Brownlow, 1st Baron Lurgan and his family. The property remained in the family until the start of the 20th century, when it was purchased by Lurgan Real Property Company Ltd. It was later sold to Lurgan Loyal Orange District Lodge (the local  lodge), who continue to own the property today.

Throughout the world wars of the 20th century, the building played an important role as a headquarters for various military purposes. During the First World War the house acted as the headquarters of the 16th Battalion Royal Irish Rifles and the 10th Battalion Royal Irish Fusiliers, while in World War II it was The Head Quarters of The United States Expeditionary Force for American troops stationed in Northern Ireland.[3]

In 1996 the building was badly damaged by an arson attack. Lurgan architectural firm DSC Partners designed the building's refurbishment, which also involved an expert from the restoration that followed the 1992 Windsor Castle fire.[4]

In 2016 a museum was opened in the basement of the building to commemorate the role of the US ARMY in Northern Ireland during World War 2 And in Particular the role played by Brownlow House HQ were Operation Torch was planned and were Eisenhower stayed for 2 nights prior to D Day and the Normandy landings

In August 2015 a World War I  and local history exhibition was added, highlighting the building's usage as a military outpost and the role it played in establishing the town of Lurgan.

Brownlow  was used as a military headquarters in both world wars.