Ramanujan IT City is an information technology (IT) special economic zone (SEZ) situated in Chennai, India.

Named after the Indian Mathematician Srinivasa Ramanujan, it is a joint venture of Tata Realty and Infrastructure Limited (TRIL), Indian Hotels Company Limited (IHCL) and Tamil Nadu Industrial Development Corporation (TIDCO).

[1] The project is located on a 25-acre site situated along the Old Mamallapuram Road opposite the Thiruvanmiyur MRTS Railway Station, north of the Taramani IT corridor where the majority of the city's IT sector is housed.

The processing zone is the IT portion of the development consisting of four office buildings of approximately 60 m in height.

The buildings have 8-m-high entrance lobbies, and each floor has floor-plates ranging from 50,000 sq ft to 100,000 sq ft in various blocks, with a floor-to-floor height of 3.75 m. The non-processing zone consists of a mixed-use development consisting of a convention centre, retail, residential, hospitality and entertainment facilities along with below-ground car parking.