Toa Payoh MRT station is an underground Mass Rapid Transit (MRT) station on the North South line (NSL) in Toa Payoh, Singapore. Located in the town centre of Toa Payoh, it is integrated with the Toa Payoh Bus Interchange and the HDB Hub, headquarters of the Housing and Development Board. The station is underneath the intersection of three roads: Lorong 1 Toa Payoh, Lorong 2 Toa Payoh and Lorong 6 Toa Payoh.

The Mass Rapid Transit system, locally known by the initialism MRT, is a rapid transit system in Singapore and the island country's principal mode of railway transportation. The system commenced operations in November 1987 after two decades of planning with an initial 6 km (3.7 mi) stretch consisting of five stations. The network has since grown to span the length and breadth of the country's main island – with the exception of the forested core and the rural northwestern region – in accordance with Singapore's aim of developing a comprehensive rail network as the backbone of the country's public transportation system, averaging a daily ridership of 3.4 million in 2019.