The town attained district headquarters status in 1997. Tiruvallur houses many Industries including few Fortune 100 companies. Tiruvallur is rich in industry, with some of the following industries in that region. Hindustan Motors has Lancer Car plant, Caterpillar Earth moving Equipment Plant from (9th Feb 2001 ), Hanil Lear, Delphi TVS, India Japan Lighting, Kingfisher's brewery division, Style SPA furniture, TI India, TCL etc. Mitsubishi entered India in 1998 as a part of its global expansion programme. It has a manufacturing facility in Tiruvallur near Chennai with technical collaboration with Hindustan Motors.
Tiruvallur is well surrounded by Industrial hubs in and around Chennai like Ambattur Industrial Estate and Sriperumbudur Industrial Estate. There is good rail connectivity to Ambattur through Suburban train, it takes 40min to travel. Also good road connectivity to Sriperumbudur through buses, it takes 45min to travel. There are many Automobile, Electrical & Electronic, Software MNC's are located around Tiruvallur
