| Aranthangi Fort | |
| Native Language: | Tamil |
| Designation1 Type: | Cultural |
| Designation1 Free1name: | State Party |
| Designation1 Free2name: | Region |
| Location: | Aranthangi, India |
| Built: | 16th or 17th century |
| Architect: | Tondaiman |
| Coordinates: | 10.1631°N 78.9962°W |
Aranthangi Fort is a fortress situated in the town of Aranthangi in Pudukkottai district, Tamil Nadu, India. It was constructed in the 16th or 17th century AD by Tondaiman kings. Nearby, there is an 11th-century Hindu temple constructed by Rajendra Chola.