Koderma sub-division was made from Hazaribagh district in 1973. Later on 10th April 1994  it made full –fledged district. Now, Koderma district have six blocks. Koderma Sadar, Jainagar , Markacho,Satgawan Chandwara and Domchanch

Kodarma district of Jharkhand state has been famous worldwide for mica minning,specially for ruby mica. The district had the monopoly in producing mica for years and themica was exported to many countries worldwide. The main reserve of mica is found under theforest of mild life sanctuary of Kodarma. Mica is also found in the area of Dhab, Dhodhakola,Khalagthambi, Dibour, Bandarchua, etc.Years ago The Name of This Place Was Given Koderma. Due To The Penance of Kadram Rishi.

The district is bounded by 24.15’46’’ and 24.49’18’’ N latitude and 85.26’01’’and 85.54’16’’ east longitude and covers an area of about 1655.61 sq Km. It is bounded on the North by the Nawada district of Bihar, on the south by Hazaribag district of Jharkhand, on the east by Giridih district of Jharkhand and on the west by the Gaya district of Bihar

Early History

There is not any authentic recorded history available of the district. Since the district wasan integral part of the Hazaribag district till recent past, i.e., 09.04.1994 the history of the district of Kodarma is upto the great extent history of Hazaribag district (old).In very early times the district was covered with inaccessible hills and forests to which many non-Aryan tribals who refused to surrender to the steadily advancing Aryans, retired atdifferent times. The entire territory of Chotanagpur known as Jharkhand (meaning forestterritory) was presumably beyond the pale of direct Hindu influence during ancient India.
However, Jarasandh, the mighty emperor of Rajgrih in the Mahabharat period might haveexercised some kind of loose supervision over the area. Similarly, Mahapadmanad Ugrasenof Magadh who subdued the entire country up to Orrisa might have gained some control overJharkhand as well. Possibly the area was included in Magadhan empire in the reign of Ashok(273-232 B.C)There is evidence to show that this tract was in touch with many other parts of India.
With the decline of Mauryan power king Kharavela of Kalinga led an army through Jharkhandand ransacked Rajgrih and Pataliputra. Later, Samudragupta (335-380A.D.) must have passed through the area on his expedition to the Deccan. The Chinese traveler Itsing isbelieved to have journeyed through the Chotanagpur plateau on his travel to Nalanda and Bodh Gaya.

The Chotanagpur Raj is believed to have been set up in 5th century A.D. after the fallof the imperial Guptas. Phanimukut was elected the first king. It is said that just after his birth,he had been found by the side of a tank under the protection of huge ‘nag’ or serpent. For thisreason the scions of the dynasty founded by him called themselves ‘Nag Vanshi’ or memberof the ‘Naga dynasty’.
Archaeological remains are found at Ghorsima in the district of Kodarma.