The Manx Museum in Douglas, Isle of Man is the national museum of the Isle of Man. It is run by Manx National Heritage.
The museum opened in 1922, in a building that was formerly Noble's Old Hospital. It was expanded and remodeled during 1986–89.The museum serves as headquarters of Manx National Heritage.The museum bears no relation to the institution with the same name formed by Trevor Ashe in 1825.