Railways constitute a vital component of Bihar’s transport infrastructure, ensuring seamless connectivity within the State and with the rest of India. The State is primarily served by the East Central Railway, which manages one of the densest rail networks in the country.

Bihar has an extensive rail network connecting all major districts, towns, and economic centers, including Patna, Gaya, Muzaffarpur, Bhagalpur, Barauni, and Darbhanga. The State is well linked to metropolitan cities such as Delhi, Mumbai, Kolkata, and Chennai through high-frequency passenger and freight services.