The papers consist of a wide variety of documents covering many aspects of local, national and international Liberal politics. These include campaigns, committees, clubs and charitable organisations administered by the Liberal party or of interest to the Liberal party. This collection also includes the papers of individuals relating to the Liberal cause. The administrative papers of the National Liberal Club and its subcommittees are also included. Some noteworthy elements are:
- Minute books of the Central Liberal Association, 1860-1914.
- Papers of the Executive Committee of the Liberal Council, 1927-1940.
- Papers of the Liberal Social Council, 1904-1965.
- Papers of the National League of Young Liberals, 1957-1975.
- Proceedings of the Council of the National Liberal Federation, 1879-1939.
- Whip's Office Letters, 1877-1938.
- Papers of Derek Mirfin concerning the Union of University Liberal Societies, 1949-1963.
- Letters to Alfred Austin, the Poet Laureate, 1881-1910.
- Letters, printed ephemera and autobiographical notes on Sir Geoffrey Le Mesurier Mander, MP for Wolverhampton East and High Sheriff of Staffordshire, 1922-1957.
- Manuscript papers relating to Francis Schnadhorst and the organisation of the Liberal Party, 1881-1962.
- Letters to Charles Geake, head of the Liberal Publication Department, 1892-1918.
- Correspondence relating to Miss Emily Trevillion and Lady Violet Bonham-Carter, 1917-1968.
- Minutes of meetings and membership list of the Hampshire Whig Club, 1793-1798.
- Executive Committee Report of the Home Counties Liberal Federation, 1908, 1924-1945.
- Walthamstow Central Liberal and Radical Association letters, notes and ephemera, 1935-1946.
- Papers of the Union of Liberal Students, 1964-1968.