Rajendra Rai was an Indian politician. He was elected as a member of Bihar Legislative Assembly from Hajipur constituency in Vaishali district.
Rai was won in 1995 as a Janata Dal candidate but lost thrice from Nityanand Rai and also in by poll election 2014 to Awadhesh Singh as a member of Janata Dal (United).
Rajendra Rai served as a minister for Science and Technology in Government of Bihar under chief minister of Lalu Prasad Yadav.