Giridih (Hindi: गिरिडीह) is headquarters of the Giridih district of Jharkhand state, India. The literal meaning of Giridih is the land of hills & hillocks – giri, a Hindi word, means hills and dih, another word of the local dialect, indicates upland. Before 1972 Giridih was part of Hazaribagh district.Giridih is a centre of the prestigious Indian Statistical Institute (ISI).