The Watt Library or Watt Monument Library in Greenock, Scotland, opened on its current site in 1837 and was the direct descendant of the Greenock Library, a subscription library founded in 1783. It closed as a subscription library in 1971 and re-opened as a public facility in 1973 under the name of the Watt Library, specialising in Local History and Archives. The building was designed in the Gothic revival style by architect Sir Edward Blore and is a listed building. It has undergone recent refurbishment and re-opened in November 2019 as the Watt Institution, incorporating the McLean Museum Watt Lecture Hall and Inverclyde Archives.