Philosophy department was one of the initial departments of Deoghar College it too was started in 1951 as a subject of intermediate study and than in 1954 and 1960 got recognition for B.A(Pass) and B.A(Honors) respectively. The department was founded by Prof. Pitamber Jha who joined Patna University in 1953. The department was later nurtured by a great scholar Prof. Shiv Shankar Singh another great scholar Prof. Nityanand Mishra too gave his services to the department and retired from the college. During his time Prof Panchanan Bhagat, Prof. Shakti Dhar Upadhyay and Prof. Shanti Shekhar Dwari joined the college, in between this period Prof. Upadhyay left this world which was very stunning and astonishing. Prof. Rameshwar Mandal joined from Madhupur College. Prof Mandal being the senior most lecturer of the University became the Dean at University. Dr. Ashok Jha joined from Jammui college in 2002, He is a seasoned Professor of the University and has guided many research work. Prof Mahesh Prasad Singh is a jewel of this department, who is sharing the honour along with Dr. Ashok Jha and Dr. Vinod Kumar Sinha.