Established in 2007, Historians of the Twentieth Century United States (HOTCUS) exists to facilitate and promote scholarship in the field of twentieth century American history. Although it is based in the United Kingdom, with strong links to the British Association of American Studies (BAAS), the association of British American Nineteenth Century Historians (BrANCH), and the American Politics Group (APG), HOTCUS also draws its membership from universities in Ireland, mainland Europe, the United States and other countries around the world.

HOTCUS warmly encourages the participation of postgraduate members in its activities.