| Sillanatham | |
| Native Name Lang: | ta |
| Settlement Type: | Neighbourhood |
| Pushpin Map: | Tamil Nadu |
| Coordinates: | 8.8748°N 78.0702°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Tamil Nadu |
| Subdivision Type2: | District |
| Subdivision Name2: | Thoothukudi |
| Established Title: | |
| Unit Pref: | Metric |
| Elevation M: | 54.05 |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Tamil, English |
| Demographics1 Title2: | Speech |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code: | 628402 |
| Area Code Type: | Telephone code |
| Area Code: | +91461******* |
| Blank1 Name Sec1: | Other Neighbourhoods |
| Blank1 Info Sec1: | Puthiamputhur, Ottapidaram |
| Blank2 Name Sec1: | Corporation |
| Blank4 Name Sec1: | LS |
| Blank4 Info Sec1: | Thoothukudi |
| Blank5 Name Sec1: | VS |
| Blank5 Info Sec1: | Ottapidaram |
| Blank6 Name Sec1: | MP |
| Blank7 Name Sec1: | MLA |
Sillanatham is a neighbourhood in Ottapidaram taluk[1] in Thoothukudi district of Tamil Nadu[2] state in the peninsular India.
Sillanatham is located at an altitude of about 54.05m (177.33feet) with the geographic coordinates of (8.8748°N 78.0702°W) in the Thoothukudi district. The Thoothukudi district is southeast of the Tamil Nadu state.[3]
As of 2011, Sillanatham had a population of 1,594 of which males constituted 795 and females 799, with children representing 10.1% of the population. The literacy rate is 90.39%.[4]
Sillanatham has an industrial estate of 380 acres owned by SIPCOT (State Industries Promotion Corporation of Tamil Nadu) where the ground breaking ceremony was held on February 25, 2024, for manufacturing electric vehicles and batteries by the Vietnamese electric vehicle manufacturer VinFast and the SIPCOT (joint venture).[5] [6]
Sillanatham area falls under the Ottapidaram Assembly constituency.[7] Also, this area belongs to Thoothukkudi Lok Sabha constituency.[8]