The South Eastern Railway (abbreviated SER) is one of the 19 railway zones in India and Part of Eastern Railways. It is headquartered at Garden Reach, Kolkata, West Bengal, India. It comprises Adra railway division, Chakradharpur railway division, Kharagpur railway division and Ranchi railway division.
The South Eastern Railway caters to the states of West Bengal, Jharkhand and Odisha. S.E. also runs regular electric multiple units (EMU) services to areas adjacent to Kolkata, from Howrah to Kharagpur, Amta, Medinipur, Tatanagar, Balasore, Rourkela and Santragachi to Shalimar. It also handles major freight traffic to Kolkata and Haldia and Howrah to Digha and Mecheda to Digha
The Department of Post released a commemorative stamp on 28 March 1987 on centenary of south eastern railway.