Begusarai was named after Begu, a man who was the devotee of Bari Durga Maharani and was the caretaker of Sarai, the town's old market.

Begusarai lies in North Bihar and is surrounded by Khagaria in the northeast, Munger in the southeast, Patna in the west, and Samastipur in the northwest.

[11][12] It is the location of the independence movement veteran, first chief minister, and one of the architects of modern Bihar, Shri Krishna Sinha.

The main crops of the Begusarai district are oilseeds, anise seeds, tobacco, jutes, potatoes, red chilis, tomatoes, and rape-seeds.

Begusarai is famous for Simaria, a fair of devotional significance every year usually during November in the month of Kartik, according to the Indian Panchang.

Panjabi Kurta and Dhoti have a Mithila Painting bordered Maroon coloured Gamchha, the Symbol of Passion, Love, Bravery, and Courage, are common clothing items for men.

In ancient times, there was no colour option in Mithila, so the Maithil women wore white or yellow sari with a red border.

Today, they wear Laal-Paara (the traditional red-boarded white or yellow sari)[18] on some special occasions, as well as Shakha-Pola,[19] with lahthi in their hand.