Suryadev Singh is a former Indian politician based in Bihar, who was elected to Bihar Legislative Assembly twice from Bikramganj Assembly constituency of Rohtas district. He was first elected to Bihar Legislative Assembly as the candidate of Indian People's Front in 1990 Bihar Legislative Assembly election. Later, he defected to Rashtriya Janata Dal and in a run up to 1995 Bihar Legislative Assembly election, he was again elected to Bihar Legislative Assembly, this time, on the symbol of Rashtriya Janata Dal. Before his retirement from politics, following his conviction in a murder case, he was a member of Janata Dal (United). The Bikramganj Assembly constituency ceased to exist after 2005, after the delimitation of constituencies.