| Elangadu | |
| Other Name: | Rajagiri, Vaalaivanam |
| Nickname: | Rajagiri, Vaalaivanam |
| Settlement Type: | Village |
| Pushpin Map: | India Tamil Nadu#India |
| Pushpin Label Position: | right |
| Pushpin Map Caption: | Location in Tamil Nadu, India |
| Coordinates: | 10.8353°N 78.9277°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Tamil Nadu |
| Subdivision Type2: | District |
| Subdivision Name2: | Thanjavur |
| Subdivision Type3: | Taluk |
| Subdivision Name3: | Budalur |
| Founder: | Karalmax Palani Murugan |
| Leader Title: | Panchayat President |
| Unit Pref: | Metric |
| Population Total: | 1600 |
| Population As Of: | 2019 |
| Population Density Km2: | auto |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Tamil |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code: | 613104 |
Elangadu is an Indian village situated on the banks of the river Cauvery. It is about 12 kilometers from Kallanai, the Grand Anicut. It is surrounded by irrigation canals. Ilankaadu, in Thanjavur district, is nearby. In this village,
Agriculture is the main occupation in this area. Paddy cultivation is a common occupation along with rice, coconut, banana and sugar cane
Students are taught in Tamil.
The residents' passion for Tamil and their desire to become teachers dates to 1881 when ‘Nattramizh Sangam’ was established at the village.
Tamil scholar Pandithurai Devar arrived at Ilankaadu for the inauguration of the Sangam that year. and Tamil has been taught since. Until 2005, Tamil classes and speeches were held every evening. Scholars including UV Saminatha Iyer, Maraimalai Adigal, Somasundara Barathiyar, and many others spoke there.
At the 2018 census, Elangadu had a total population of around 1600 with 790 males and 810 females. The sex ratio was 10:20 and the literacy rate was 77.11%.
Temples:
Every year in May and June, the Thiruvizha festival is performed in the Thurowpathi Amman Temple.