The 12651 / 12652 Tamil Nadu Sampark Kranti Express is one of the Sampark Kranti Express trains, operating on India's broad-gauge network that connects Madurai Junction in Tamil Nadu and Hazrat Nizamuddin in New Delhi, a distance of approximately 2,676 kilometres (1,663 mi) in 42 hours approximately, maintaining an average speed of 63 km/h (39 mph).

From April 2021, it runs with newly manufactured highly refurbished LHB rakes.

This bi-weekly train was introduced to provide a quicker journey from New Delhi to Tamil Nadu.

Southern Railway began operating the train on 19 September 2004.

[1] It shares its rakes with 22623/22624 Madurai–Chennai Egmore–Madurai Bi-weekly Superfast Express (via Dindigul, Trichy, Thanjavur, Viluppuram).