First election in this assembly constituency was held in 1957 after the delimitation order (DPACO – 1956) was passed in 1956.

The constituency was assigned identification number 20 after "Delimitation of Parliamentary and Assembly Constituencies Order, 2008" was passed in the year 2008.

[1][2][3][4] Extent of Dhampur Assembly constituency is KC Sherkot, PCs Ajitpurdasi, Berkhera Tanda, Chak Mohmad Nagar, Jamapur, Jasmor, Manpur Shivpuri, Mitthepur, Moh.

Alipur Madho, Mukerpuri, Palanpur, Rasoolpur Mohd.

Kuli, Sabdalpur, Saddober, Safiyabad, Salarabad, Seohara of Seohara KC, PCs Amkhera Shanjarpur, Bamnoli, Chakrajmal, Dhampur Husainpur, Fatehullapur Khas, Mauzampur Jaitra, Mohri, Mozampur Suraj, Nindru of Dhampur KC, Dhampur MB, Sherkot MB & Seohara MB of Dhampur Tehsil.