| Sayalgudi | |
| Settlement Type: | Town |
| Pushpin Map: | India Tamil Nadu |
| Pushpin Map Caption: | Sayalgudi, Tamil Nadu |
| Coordinates: | 9.1679°N 78.4457°W |
| Subdivision Type: | Country |
| Subdivision Name: |  India |
| Subdivision Type1: | State |
| Subdivision Name1: | Tamil Nadu |
| Subdivision Type2: | District |
| Subdivision Name2: | Ramanathapuram |
| Government Type: | Town Panchayat |
| Governing Body: | Sayalgudi Peruratchi |
| Unit Pref: | Metric |
| Elevation M: | 34 |
| Population Total: | 12,049 |
| Population As Of: | 2001 |
| Population Density Km2: | auto |
| Demographics Type1: | Languages |
| Demographics1 Title1: | Official |
| Demographics1 Info1: | Tamil |
| Timezone1: | IST |
| Utc Offset1: | +5:30 |
| Postal Code: | 623120 |
| Registration Plate: | TN65 |
Sayalgudi is a town panchayat in Ramanathapuram district of Tamil Nadu State in India . It is located west of the district along the East Coast Highway towards Kanyakumari. The state highway SH200 passes through the town connecting districts of Thoothukudi and Tirunelveli. It surrounded by many small villages and acts as marketplace for people.
India census,[1] Sayalgudi had a population of 12,049. Males constitute 50% of the population and females 50%. Sayalgudi has an average literacy rate of 68%, higher than the national average of 59.5%; male literacy is 77%, and female literacy is 59%. 12% of the population is under 6 years of age.