|Elevation||14 m (46 ft)|
|Time zone||IST (UTC+5:30)|
As of 2001[update] India census, 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.
Sayalgudi is the educational centre for students from about 50 villages that are nearby. There is a Government Higher Secondary school and a private Matriculation school. Sayalgudi has a Government Primary Hospital and several other private clinics.
There are a few beaches nearby, as Sayalgudi is close to the Eastern coast of India.
- "Census of India 2001: Data from the 2001 Census, including cities, villages and towns (Provisional)". Census Commission of India. Archived from the original on 2004-06-16. Retrieved 2008-11-01.