Asansol Junction is a railway station of Eastern Railway in Asansol of Paschim Bardhaman district in the Indian state of West Bengal. The station is on the Howrah–Delhi main line. It is the 8th busiest railway station in India in terms of frequency of trains after Kanpur Central, Vijayawada Junction, Delhi Junction, New Delhi, Ambala Cant, Howrah and Patna Junction. Around 171 trains pass through the station daily. It serves Asansol and the surrounding areas.

The Eastern Railway is among the 19 zones of the Indian Railways. Its headquarters is at Fairley Place, Kolkata and comprises four divisions: Howrah, Malda, Sealdah, and Asansol. Each division is headed by a Divisional Railway Manager (DRM). The name of the division denotes the name of the city where the divisional headquarters is located. Eastern Railway oversees the largest and second largest rail complexes in the country, Howrah Junction and Sealdah railway station, and also contains the highest number of A1 and A Category Stations like Howrah, Malda Town, Sealdah, Asansol, Kolkata, Durgapur, Barddhaman, Rampurhat Junction, Bhagalpur,Jamalpur, Jasidih, Bandel and Naihati. Eastern Railways operates India's oldest train, Kalka Mail.