Cheyyar is a town in the Tiruvannamalai District in the Tamil Nadu state of South India. The most common name of this town is Cheyyar but it is also referred to as Thiruvetipuram in many government records. It gets its name Cheyyar River as the town initially was developed on the river beds of cheyyaru. As of 2011, the town had a population of 37,802.
The town is situated at 30 km from Kanchipuram, 90 km from Thiruvannamalai, 34 km from Arani and 100 km from Chennai,60 km from Vellore,32 km from Arcot, as well connected by buses on SH 5 and SH 45. The town contains an ancient temple called Vedapureeswarar Temple situated on the banks of the river.
Cheyyar is located at 12.6580°N 79.5424°E on the banks of Cheyyar River in the northeastern corner of Thiruvannamalai district of Tamil Nadu. It is 100 km southwest of Chennai the state capital.
According to 2011 census, Tiruvethipuram had a population of 37,802 with a sex-ratio of 1,014 females for every 1,000 males, much above the national average of 929. A total of 3,749 were under the age of six, constituting 1,940 males and 1,809 females. Scheduled Castes and Scheduled Tribes accounted for 12.81% and .56% of the population respectively. The average literacy of the town was 76.59%, compared to the national average of 72.99%. The town had a total of : 9162 households. There were a total of 14,580 workers, comprising 294 cultivators, 489 main agricultural labourers, 1,247 in house hold industries, 11,205 other workers, 1,345 marginal workers, 20 marginal cultivators, 109 marginal agricultural labourers, 206 marginal workers in household industries and 1,010 other marginal workers. As per the religious census of 2011, Tiruvethipuram had 88.6% Hindus, 9.4% Muslims, 1.11% Christians, 0.02% Sikhs, 0.02% Buddhists, 0.46% Jains, 0.38% following other religions and 0.01% following no religion or did not indicate any religious preference.
Cheyyaru started industrialization following the establishment of the industrial complex by the State Industries Promotion Corporation of Tamil Nadu (SIPCOT). with an allotable field area of 619.35 Acres. Since the investment hot-spots such as Sriperumbudur and Oragadam have become overcrowded, Cheyyaru has become an alternative choice. This is evidenced by the recent announcements of a 250-acre (1.0 km2) hi-tech Special Economic Zone for automotive components, a 300-acre (1.2 km2) electronics hardware park and the commitment from the Taiwanese Shoe Company to set up its unit. One of the largest sugar mills in the country - Cheyyar co-operative sugars - is situated near the town. In November 2009 Tamil Nadu cabinet approved the Mahindara & Mahindra's Rs 1800 core automobile project in 450 acres. This unit will produce tractors, SUVs and commercial vehicles and auto parts. Aluminum die cast unit by Ashley Alteams, a joint venture by Ashok Leyland and Finland-based Alteams Oy started its production in January 2010. This High pressure die cast will manufacture automobile and telecommunication components with initial capacity of 7000 ton per year.