| Melmaruvathur | |
| Native Name Lang: | ta |
| Settlement Type: | town |
| Pushpin Map: | Tamil Nadu |
| Pushpin Map Caption: | Melmaruvathur, Chengalpattu, Tamil Nadu |
| Coordinates: | 12.4268°N 79.83°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Tamil Nadu |
| Subdivision Type2: | District |
| Subdivision Name2: | Chengalpattu |
| Established Title: | |
| Unit Pref: | Metric |
| Elevation M: | 83 |
| Population Total: | 3367 |
| Population As Of: | 2011 |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Tamil, English |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code Type: | PIN |
| Postal Code: | 603319 |
| Area Code Type: | Telephone Code |
| Area Code: | +9144xxxxxxxx |
| Blank1 Name Sec1: | Other Neighborhoods |
| Blank1 Info Sec1: | Chengalpattu, Maduranthakam, Acharapakkam |
| Blank2 Name Sec1: | Municipal body |
| Blank3 Name Sec1: | District Collector |
| Blank3 Info Sec1: | A. R. Rahul Nadh, I. A. S. |
| Blank4 Name Sec1: | LS |
| Blank5 Name Sec1: | VS |
| Blank6 Name Sec1: | MP |
| Blank7 Name Sec1: | MLA |
| Website: | https://chengalpattu.nic.in |
Melmaruvathur is a town located in Tamil Nadu, India. It is in the Cheyyur Taluk of Kancheepuram district. The town is known for having the shrine of goddess Adhi Parashakthi, the Om Shakti Temple.[1] 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.