The Rotunda radicals, known at the time as Rotundists or Rotundanists, were a diverse group of social, political and religious radical reformers who gathered around the Blackfriars Rotunda, London, between 1830 and 1832, while it was under the management of Richard Carlile. During this period almost every well-known radical in London spoke there at meetings which were often rowdy. The Home Office regarded the Rotunda as a centre of violence, sedition and blasphemy, and regularly spied on its meetings.

Joseph Hume FRS was a Scottish surgeon and Radical MP.