| Saidapettai (Syedabad) | |
| Settlement Type: | Former second grade municipality |
| Pushpin Map: | Tamil Nadu |
| Pushpin Label Position: | left |
| Coordinates: | 13.0235°N 80.2237°W |
| Area Total Km2: | 67.73 |
| Population As Of: | 1941 |
| Population Rank: | 31 (as of 1941) |
| Population Density Km2: | auto |
| Subdivision Type: | Country |
| Subdivision Name: | India |
| Subdivision Type1: | State |
| Subdivision Name1: | Tamil Nadu |
| Subdivision Type2: | District |
| Subdivision Name2: | Chingleput District (Madras Presidency) |
| Subdivision Type3: | Municipality (not exists) |
| Subdivision Name3: | Saidapettai |
| Area Urban Km2: | 56.73 |
| Elevation M: | 12 |
| Population Total: | 45,912 |
Saidapettai (Syedabad is a dead municipality which is annexed to Chennai in the year 1946.[1] It was the district headquarters of the erstwhile Chingleput District from 1801 to 1904.
Saidapet is a former municipality that comprised the villages of Adyar, Mambalam, Kodambakkam, Puliyur, Saali Garamam, and Teynampet. T. Nagar, the major business hub of Chennai, was once part of Saidapet municipality. All of Saidapet Municipal Council was annexed to the town of St. George in 1946.
After the annexation of Saidapet, Madras municipality became a city.