Kollam Junction railway station is an NSG–3 category Indian railway station in Thiruvananthapuram railway division of Southern Railway zone.) It is a junction station situated in the city of Kollam in Kerala, India. It is the second largest railway station in Kerala in terms of area and largest in terms of number of tracks and one of the oldest railway stations in the state. It is also the second busiest railway station in Kerala in terms of trains handled per day. World's third longest railway platform is situated at Kollam railway station.

Thiruvananthapuram Railway Division (TVC) or Trivandrum Railway Division(TVC) is one of the six administrative divisions of the Southern Railway, Indian Railways. It has its headquarters at Thiruvananthapuram, the capital city of the state of Kerala, India. Thiruvananthapuram Division was formed on 2 October 1979 which serves the eight districts of southern part of the Kerala, Kanniyakumari district and some parts of Tirunelveli District in Tamil Nadu. With 104 stations in its territorial jurisdiction, it is the fourth largest out of six divisions in Southern Railway. It is the southernmost railway division of India and manages 625 km of route track and 108 railway stations in the states of Kerala and Tamil Nadu. The major stations of the division are Thiruvananthapuram Central, Ernakulam Junction, Kollam Junction, Thrissur, Kottayam, Ernakulam Town, Chengannur, Kayamkulam, Aluva, Nagercoil Junction, Kanniyakumari,Changanasseri, Tiruvalla, Kochuveli, Varkala,Mavelikara, Angamaly ,,Karunagappally and ,Pudukad