| Thalachangadu | |
| Native Name Lang: | ta |
| Other Name: | Thalaiudaiyavar Kovil Pathu |
| Settlement Type: | Village |
| Pushpin Map: | India Tamil Nadu#India |
| Pushpin Label Position: | left |
| Pushpin Map Caption: | Location in Tamil Nadu, India |
| Coordinates: | 11.1244°N 79.7944°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Tamil Nadu |
| Subdivision Type2: | District |
| Subdivision Name2: | Mayiladuthurai |
| Subdivision Type3: | Sub-cort |
| Subdivision Name3: | Mayiladuthurai |
| Parts Type: | Talukas |
| Parts: | Tharangambadi |
| Leader Title1: | Panjayat - President |
| Unit Pref: | Metric |
| Area Footnotes: | Thiru + thalai + sangu + gadu |
| Area Total Km2: | 2 |
| Population As Of: | 2011 |
| Population Density Km2: | auto |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Tamil language |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code Type: | PIN |
| Postal Code: | [609107] |
| Area Code Type: | Telephone code |
| Area Code: | [04364] |
| Registration Plate: | [TN-51] & [TN-82] |
| Blank1 Name Sec1: | Nearest city |
| Blank1 Info Sec1: | Thiruchampalli |
| Blank2 Name Sec1: | Lok Sabha constituency |
| Blank2 Info Sec1: | Mayiladuthurai |
| Blank3 Name Sec1: | Vidhan Sabha constituency |
| Blank3 Info Sec1: | Poombuhar |
| Blank4 Name Sec1: | IUCN category |
| Blank5 Name Sec1: | Central location |
| Blank1 Name Sec2: | Climate |
| Blank1 Info Sec2: | Tripical (Köppen) |
Thalachangadu is a historical village located in Mayiladuthurai District, Tamil Nadu, India, on the bank of the Cauvery River. Its southern boundary is the Rajendran Channel, on the north side is the Cauvery River, on the east side is MelaPerumPallam and on the western side is Natraja Pillai Chavadi.
In Thalachangadu there is a big Siva temple, named Sangaraneswarar. This is one of the temples prized by Thirugnanasambanthar in Thevaram.
There is another Siva temple named Dhaxenapurieswar-Agliyandeswri and this temple is famous for the god of Satarn (Sanieswar) who is facing to the west side. Saturn lies in the north east corner of the temple.
Naanmadiya Perumal temple is under the presiding Deity is the Hindu god Vishnu. It is one of the Divya Desams, the 108 temples of Vishnu revered by the 12 poet saints, or Alwars. The Lord of this Divyadesa temple is praised in the Mangalasasanam hymn of Tirumangai Azhwar. In this Divyadesa temple, Perumal appears with crescent moon on His head as Lord Shiva facing east and in a standing form. Hence, the name of Perumal is Nanmadhia Perumal and Chandra Shaba Harar, one who released Chandra from his curse. The Vimana-tower above the sanctum sanctorum is known as Chandra Vimanam. Those facing adverse aspects of planet Moon are advised to come to this temple and worship Lord and Mother for relief.[1]