Basawon Singh or Basawan Singh also known as Basawon Sinha, (23 March 1909 – 7 April 1989) was an Indian independence activist and a campaigner for the rights of the underprivileged, industrial labourers and agricultural workers. He spent a total of 18 and a half years in prisons in British India as a consequence of his support for independence and he was committed to democratic socialism. Along with Yogendra Shukla, he was a founder member of the Congress Socialist Party in Bihar. Among his revolutionary colleagues and friends he was called Lambad because of being very tall.