Rajgir Assembly constituency is one of 243 constituencies of legislative assembly of Bihar. It is a part of Nalanda Lok Sabha constituency along with other assembly constituencies viz. Islampur, Harnaut, Hilsa, Nalanda, Asthawan and Biharsharif.
Rajgir comprises CD Block Giriyak; Nagar Panchayat Pawapuri, Nagar Parishad Rajgir.Gram Panchayat Nai Pokhar & Rajgir (NA) of Rajgir CD Block; Gram Panchayats Gorawan, Mahuri, Kul Fatehpur, Sabait, Dharhara, Nanand, Karianna, Ghostawan, Barakar, Pawadih, Gorma & Silao (NA) of Silao CD Block; Gram Panchayats Sakraul, Korai, Tungi, Muraura, Mahamadpur Nakatpura, Tiuri, Chhabilapur, Pawa, Hargawan, Singthu, Palatpura, Tetrawan, Paroha & Sarbahadi of Bihar CD Block.