| Melaseithalai | |
| Settlement Type: | village |
| Pushpin Map: | India Tamil Nadu#India |
| Pushpin Map Caption: | Location in Tamil Nadu, India |
| Coordinates: | 8.9816°N 78.0773°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Tamil Nadu |
| Subdivision Type2: | District |
| Subdivision Name2: | Thoothukudi |
| Unit Pref: | Metric |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Tamil |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code Type: | PIN |
| Postal Code: | 628722 |
| Registration Plate: | TN 69 |
Melaseithalai is a village in Ottapidaram taluk of Thoothukudi District, Tamil Nadu, India. The village comes under Vilathikulam (state assembly constituency) and Thoothukudi (Lok Sabha constituency).
Melaseithalai is located 25 km away from the district headquarters on the National Highway 45B. The village comes under the administrative control of Jegaveerapandiyapuram panchayat, Ottapidaram taluk, Thoothukudi district, Tamil Nadu, India.
The village has a branch office (B.O.) of India Post.[1] The village also has a Sub-Primary Health Centre functioning under Eppodum vendran Primary Health Centre (PHC)[2]