Rajganj is an assembly constituency in Jalpaiguri district in the Indian state of West Bengal.

18 Rajganj Assembly constituency (SC) covers Binnaguri, Kukurjan, Majhiali, Mantadari, Panikauri, Sannyasikata, Sikarpur and Sukhani gram panchayats of Rajganj community development block, and Baropatia Nutanabos, Belakoba, Paharpur and Patkata gram panchayats of Jalpaiguri community development block.

In the 2009 bye-elections, caused by the election of sitting MLA Mahendra Kumar Roy from Jalpaiguri (Lok Sabha constituency), Khageswar Roy of Trinamool Congress won the Rajganj (SC) seat.

[4][5] In the 2006 state assembly elections,[6] Mahendra Kumar Roy of CPI(M) won the Rajganj (SC) assembly seat defeating his nearest rival Khageswar Roy of Trinamool Congress.

Contests in most years were multi cornered but only winners and runners are being mentioned.