Giridih district is one of the twenty-four districts of Jharkhand state, India, and Giridih is the administrative headquarters of this district. As of 2011 it is the third most populous district of Jharkhand (out of 24), after Ranchi and Dhanbad.
Giridh district was a part of Kharagdiha estate till late 18th century. During the British Raj Giridih became a part of Jungle Terry. After Kol Uprising in 1831, the parganas of Ramgarh, Kharagdiha, Kendi and Kunda became parts of the South-West Frontier Agency and were formed into a division named Hazaribag as the administrative headquarters. The Kharagdiha Rajas were settled as Rajas of Raj Dhanwar in 1809, and the Kharagdiha gadis were separately settled as zamindari estates. Some of the notable Kharagdiha Zamindari estates were Koderma, Gadi Palganj, Ledo Gadi, Gande Gadi, Ghoranji Gadi and Gadi Sirsia. Giridih district was created on 6 December 1972 by carving some parts of Hazaribagh district. In 1999 part of it became Bokaro district.
It is currently a part of the Red Corridor. The 15,000-capacity football and cricket stadium named Giridih Stadium is the largest sports venue by capacity in the region. It is located in the town of Mahthadih.
The district, covering an area of around 4854 km, is bounded on the north by Jamui district and Nawada district of Bihar state, on the east by the districts of Deoghar and Jamtara, on the south by Dhanbad and Bokaro, and on the west by Hazaribagh and Koderma districts. Giridih has an average elevation of 289 metres (948 feet). Sri Sammeta Shikharji also known as the Parasnath Hills, located in Giridih is the highest mountain peak in Jharkhand. It is a conical granite peak located 4,477 feet (1,382 metres) above the sea level.
Giridih district consists of 13 Blocks. The following are the list of the Blocks in Giridih district:
Bagodar block, Bengabad block, Birni block, Deori block, Dhanwar block, Dumri block, Gandey block, Gawan block, Giridih block, Jamua block, Pirtand block, Suriya block and Tisri block
There are six Vidhan Sabha (legislative assembly) constituencies in this district. Dhanwar, Bagodar, Jamua and Gandey assembly constituencies are part of Kodarma constituency. Giridih and Dumri assembly constituencies are part of Giridih constituency.