Melmaruvathur is a town located in Tamil Nadu, India. It is in the Cheyyur Taluk of Chengalpattu district. The town is known for having the shrine of goddess Adhi Parashakthi, the Om Shakti Temple. It is a very important religious destination because of its location between Tiruvannamalai and Chennai, and also because of its very reachable location, which is blocked neither by mountains nor lakes.

The Chennai-Tiruchirappalli section of National Highway 45 passes through this town. Chennai is 92 km and Villupuram 54 km from Melmaruvathur. From here to Chennai, buses are operated to the southern districts of Tamil Nadu, like Trichy, Madurai, Virudhunagar, Thoothukudi, Tirunelveli, Kanyakumari and Vellore, Tiruvannamalai, Vandavasi, Arani, Bengaluru, Hosur, Villupuram, Salem and Tiruppur. Also very close to this is the Melmaruvathur train station. All express trains stop at this station.

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