Southern Railway zone
|Locale||Tamil Nadu, Kerala, Karnataka and Puducherry|
|Dates of operation||1951-present–|
|Predecessor||South Indian Railway Company and Madras and Southern Mahratta Railway|
|Track gauge||Broad gauge and Meter gauge|
|Website||SR official website|
Southern Railway, headquartered at Chennai, Tamil Nadu, is one of the 17 zones of Indian Railways. It was the firstof the 17 zones of the Indian Railways created in independent India. It was created on 14 April 1951 by merging three state railways, namely, the Madras and Southern Mahratta Railway, the South Indian Railway Company, and the Mysore State Railway. The South Indian Railway was originally founded as Great Southern India Railway Co. founded in Britain in 1853. More than 500 million passengers travel on the network every year.
Chennai Central, Chennai Egmore, Coimbatore City Junction, Thiruvananthapuram Central, Mangalore Central, Erode Junction, Madurai Junction, Ernakulam Junction, Tirunelveli Junction, Tiruchirappalli Junction and Salem Junction are the major stations under Southern Railway Division. Chennai Central handles more than a million passengers every day. Many of the major stations are being upgraded to world-class standards.
Divisions of Southern Railway
It is organized into 6 divisions with Divisional Railway Manager (DRM) as head in charge 
Units of Southern Railway
Southern Railway has many factories and sheds located across the region. Coach manufacturing and repair are carried out at Integral Coach Factory, Perambur, Chennai and Golden Rock Railway Workshop, Tiruchirapalli. Southern Railway Signal & Telecom Workshop is located at Coimbatore. Southern railway has diesel locomotive sheds at Erode, Tiruchirapalli, Tondiarpet, Ernakulam and electrical locomotive sheds at Erode, Arakkonam and Royapuram.