Vandalur is a census town and is a locality in the south of Chennai. it is situated in Kancheepuram district in the Indian state of Tamil Nadu. it is a suburb in the southwestern part of Chennai city. Vandalur is called Entrance Gate for Chennai city. It has the Arignar Anna Zoological Park, which houses some rare species of wild flora and fauna. The neighbourhood is served by Vandalur railway station of the Chennai Suburban Railway network.Soon the proposed mono and metro rail will connenct with Proposed Vandalur Mofussil bus terminus.Government has proposed a huge bus terminus for the south bound buses in Vandalur on the Vandalur-Walajabadh state highways,adjacent to Chennai outer ring road and very near to the Vandalur Railway station.If this bus terminus starts to function,Vandalur will become the busiest hub in the city.
As of 2001[update] India census, Vandalur had a population of 13,311. Males constitute 54% of the population and females 46%. Vandalur has an average literacy rate of 79%, higher than the national average of 59.5%: male literacy is 85%, and female literacy is 72%. In Vandalur, 11% of the population is under 6 years of age.
Vandalur forms the junction of the Vandalur-Kelambakkam Road, Connecting the Grand Southern Trunk Road (GST) with Old Mamallapuram Road (OMR). The Outer Ring Road (Vandalur - Minjur) is a major transport corridor being developed along the periphery of Chennai Metropolitan Area by the CMDA. The Vandalur Flyover to be inaugurated in January 2012 will connect the east and west side of the Vandalur railway station. It will have a bowstring design similar to that of Rangarajapuram flyover. A satellite commercial corridor is likely to be developed along the Outer Ring Road (ORR) 
65-acre terminus for south-bound buses at Vandalur: The Chennai Mofussil Bus Terminus in Koyambedu, when opened in 2002, was touted as the largest in Asia. Now, the Chennai Metropolitan Development Authority has identified land for a new terminus in Vandalur, that will be more than twice the size of the CMBT, to handle south-bound long-distance buses and ease the pressure on the Koyambedu facility.
Arignar Anna Zoological Park located here also known as Vandalur Zoo. The Park was the first public zoo in India. Vandalur Zoo is originally created in 1855 near Park Town, Chennai City. Later in 1875, this zoo had expanded and moved out of the city. In 1979, the Tamil Nadu Forest department moved this zoo to Vandalur reserve forest covering an area of 1300 acres. This zoo was inaugurated in year 1985 and it's one of the largest in South Asia. There are totally 81 enclosures. More than 170 species of mammals, aviaries and reptiles are exhibited in the zoo.
This flyover will replace the level crossing near Vandalur railway station. The Rs. 27-crore flyover on the Vandalur-Walajabad Road was inaugurated recently. The 1.48-km-long flyover will replace a level crossing near the Vandalur railway station.