The history of Munger is old, in the history of India and it begins with Vedas, Purans and the Epics. In the Regveda there is reference that Munger was established by the famous Muni Mudgal Rishi. Both Lord Mahavir and Gautam passed through Munger and stopped in Munger, Lakhisarai, Rajorna till they reached Varanashi (Banaras in U.P.) Munger rose into prominence with the establishment of Pala dynasty on Bengal and Bihar (8th-12th century A.D.). The second and the most important Pala ruler Dharmpal made Munger his capital & other Pala ruler issued inscription from Munger (Popularly known as Munger plates).
With the coming of Muslim rulers to India Munger, because of it strong fortification and strategic importance also became a place for struggle between Bengal and Janupur Kingdom. Munger was very important centre for political development at the time of Akbar, Nawab of Bengal Mirkashim Ali declared Mugner as his capital and shifted completely to Munger. Munger during Mir Qasim a significant role in the conflict with the East Indian Company. The victory of East Indian company, 1764 at the battle of Buxar gave the central over whole of Bihar.
In the 19th century and early 20th century Munger became a centre of different reform movement like Brahmo Samaj, Arya Samaj, Theosophical Society.
During freedom Struggle Movement from 1885 to 1947 Munger had played an important role. The political awakening in the country after Ist World War stimulated nationalist movement in Munger District also. The visit of Mahatma Gandhi along with Shukat Ali & Mohammad Ali to Munger District in December, 1920 had tremendous political effect and had played a prominent role in the country' s struggle for freedom. There are several important personalities of Munger who played an important role in freedom struggle but it is not possible to mention the name of all important personalities who had played leading role in freedom struggle not only in the history of Munger but in the history of State Shah Mohammad Zubair. Sri Tejeshwer Prasad and three Krishnas-Sri Krishna Prasad, Shri Krishna Sinha Bihar Keshri & Sri Krishna Mishra, Radhika Prasad, Dharam Narayan Singh, Maulana Ali Azim sb., Maulvi Zaffer uddin, Baldeo Singh, Hari Shdnkar Das, Suresh Chandra Mishra, Karyanand Sharma, Nand Kumar Singh, Kumar Kalka Pd.Singh were legendary figures of Munger who had also played in exhaustive role in imparting Hindu Muslim unity.
The area of Munger district extends from Khagria in north to Jamui in South Begusarai in the West and Bhagalpur in East. It has total are of 6398.63 Sq. Kilometer. The Munger district headquarter is surrounded by river Ganga. The District is famous for Chandi Asthan. Tomb of Shah Pir-Nafah Dargah, Munger Fort, Karan Chaoura, Gun Fctory, Railway Workshop, I.T.C. Hot Spring Sita Kund, Hot water fall at Sringe Rishi at Ratanpur, Yoga Ashram, Sri Krishna Seva Sadan, Pri Pahari, Mir Qasim aurang (Sri Krishna Batika) Kashtaharni Ghat, Sit Charn, Goenka Shivalya, Ucheshwernath, Shaheed Smarak, Kharagpur Lake.
In science & technology and industry, Jamalpur workshop, Indian Tobacco Company (I.T.C.) & Gun Factory have put Munger on the general map of the country.
Generally during winter season at Chikdah near Sita Kund, which is situated in East of Munger headquarter witness aquatic Siberian fowls, cranes and flamingoes which creates an eye catching sites.
The headquarter of the District is Munger Sadar Commissioner office is established towards the North to Civil Court Building. At present Munger is missionary and District Commissioner, D.I.G., D.M., C.S.and S.P. also have their residential offices at Munger.
Administration of civil justice as well as criminal justice is fully in the hand of judiciary headed by the District & Sessions Judge, Munger under the control and supervision of the Patna high court. He is assisted by a number of Additional District & Sessions Judge, Sub Judge, Munsif and Judicial Magistrate stationed at the District Headquarter of Munger and the outlaying Sub-divisional Headquarter of Lakhisarai and Sheikhpura.
For the administration of Civil Justice and Trial of Sessions Cases, the district of Munger was formerly under the Jurisdiction of the Judgeship of Bhagalpur. With the increase in the volume of work, separate Judgeship under a District & Sessions Judge with Munger as its headquarters was carved out in the year 1914 by Government Notification No.1146-J dated 23rd December 1913, with its Jurisdiction over the whole of the district. The Judgeship of Munger thus came into existence with effect from the when the Judgeship came into existence, there were two Munsif's court viz Munisf I (the oldest court since 3rd March 1859) and Munsif II and one Sub Judge court at Munger (since 5th October 1886). The post of another Sub Judge at Munger and Sub Judge at Begusarai were created in 1918 and 1945 respectively. Besides the court functioning at the headquarter there were two Munsif's court at Begusarai and one in Jamui (now separated from Munger Judgeship) when this Judgeship came into existence in 1914.
Due to increase in the volume of work Begusarai as separate Judgeship separated from Munger in the year 1977 later on Khagaria and Jamui also caved out in the year 1991 and 2005 respectively.