Danapur railway division is one of the five divisions of East Central Railway (ECR), a zone of the Indian Railways located at Danapur in Patna district of Bihar state in eastern India. The other railway divisions are Sonpur, Samastipur, Pandit Deen Dayal Upadhyaya and Dhanbad. The revenue of division in 2014-15 fiscal was ₹900 crore (US$110 million).

The East Central Railway is one of the 19 railway zones in India. It is headquartered at Hajipur and comprises Sonpur, Samastipur, Danapur, Pt. Deen Dayal Upadhyaya, and Dhanbad divisions.