Ponneri is a town located in Chennai Metropolitan Area, Thiruvallur district in the Indian state of Tamil Nadu.

Ponneri is major destination for Andhra Pradesh people to buy goods.

Neighbouring towns are Minjur, Redhills, Gummidipoondi and Athipattu with development underway on NCTPS power plant project.

Ongoing outer ring road (Expected completion by Dec 2018)[4] is passing at a distance of 9 km (from Ponneri ) near Minjur.

Estimated cost of ₹12,500 crore with INR 3216 Cr funding from the Japan International Cooperation Agency (JICA).

The road was built by SherShahSuri in the 16th century.It was crucial for inland trade and connected India to Central Asia.