Amar Singh is an Indian politician from the state of Uttar Pradesh who was one of the leaders of Samajwadi Party. He was the general secretary of the Samajwadi Party and was a member of the Rajya Sabha, the upper house of the Indian parliament. On 6 January 2010, he resigned from all the posts of Samajwadi Party and was later expelled from the party by its chief, Mulayam Singh Yadav, on 2 February 2010. He spent a brief period in judicial custody in 2011. He finally retired from politics. In his statement he mentioned, "I want to give more time to my wife and my family. Therefore after the last day of polling, I will retire from politics." In 2016, he rejoined Samajwadi Party and was elected to Rajya Sabha even after facing a stiff opposition from a section of the party including the then Chief Minister of Uttar Pradesh Akhilesh Yadav. He was also reinstated as one of the general secretaries of the party in October 2016.