| Maranthalai | |
| Settlement Type: | town |
| Pushpin Map: | India Tamil Nadu#India |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in Tamil Nadu, India |
| Coordinates: | 8.621°N 78.06°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Tamil Nadu |
| Subdivision Type2: | District |
| Subdivision Name2: | Thoothukudi |
| Unit Pref: | Metric |
| Elevation M: | 13 |
| Population Density Km2: | auto |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Tamil |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code Type: | PIN |
| Registration Plate: | TN69 |
Maranthalai is a village in Thoothukudi district in the state of Tamil Nadu, India. Authoor is the nearby panchayat town. Thamirabarani River rover flows through Maranthalai, thus serving the village with water.