| Masarh | |
| Settlement Type: | Village |
| Pushpin Map: | pushpin_label_position = |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Bihar |
| Subdivision Type2: | District |
| Subdivision Name2: | Bhojpur |
| Subdivision Type3: | Block |
| Subdivision Name3: | Udwant Nagar |
| Unit Pref: | Metric |
| Population Total: | 8,102 |
| Population As Of: | 2011 |
| Population Density Km2: | auto |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Blank Name: | Climate |
| Blank Info: | Cwa |
Masarh or Masadh (Hindi: मसाढ़) is a village situated 10 km west of Arrah in Bhojpur district of Bihar. It is an important historical site for Jains and Hindus, situated near Karisath railway station.[1]
Masarh is derived from the word Mahāsāra. A 600 old Jain inscription in the temple of Parshvanatha has mentioned this place as Mahāsāra.[2] However, according to some other people, its name was Padmvatipura which was later chanced by a Jain Marwar to Vimalnath, after that it was changed to Matisara and then it became Masarh.
According to localities, It was the residence of Banasura, whose daughter Ukha married to Aniruddha the grandson of Krishna and its name was Sonitpur.[2] According to Archaeological Survey of India there was a statue of Banasur on ruined mould, but later the mound was excavated for making bricks for railways and the statues was in the pool made after excavation. Since Banasura was a demon and enemy of gods the villagers didn't try to save the statue, children often used to pelt stones on the statues. After that, the statues got immersed in water after first rain.
The earliest mention of the village can be found in the accounts of Xuanzang, where he named it as mo-ho-so-lo.[2] He described these places as the Places of Brahmins who didn't have respect for the laws of Buddha.[2]
Foundations of many old small temples and large number of Brahmanical statues have been found at this place.