Millbank Tower is a skyscraper in Central London at 21-24 Millbank, City of Westminster. The Tower stands at 387 feet high (118 metres), constructed in 1963 by Ronald Ward and Partners. It is a visible landmark in the London skyline, sitting beside the River Thames, half a mile upstream from the Houses of Parliament.

The most famous resident in Millbank Tower's history is the Labour Party. Before the 1997 General Election, the Labour Party took over two floors of the building as its headquarters. The £1 million per annum rent forced the party to vacate the tower in 2001.

The United Nations also had offices in Millbank Tower, vacating in June 2003, also citing high rents.