Samastipur is the seat of administration of Samastipur District
, in Bihar
. It is a major center for agricultural trade in the district. Samastipur is 74 km north-east of Patna
. Burhi Gandak River flows nearby.
Samastipur is the divisional headquarters of the North Eastern railway.
Nearest airport is at Patna. Samastipur Railway Station has direct train links with Patna, Kolkata, Delhi, Dhanbad, Jamshedpur, Muzaffarpur and Vaishali.