Qasi Sarai, also spelled Qazi Sarai, is located in Jehanabad District of Bihar. It is perched at an altitude of 223 ft above sea level.
The town shares its border with Tehta in the west, Islampur in the east, Kako in the north and Nawabganj in the south.
Barabar Caves, an important archeological site, is located nearby.
Gaya Airport is the nearest airport.
Qasi Sarai is 10 km to the south-east of Jehanabad and is served by Jehanabad Railway Station on the Patna-Gaya rail line.
