Chengam (or Chengamma[1] as on British records) is an important market town and a taluk headquarter[2] in the Foot hills of Eastern ghats[3] in Tiruvannamalai district of Tamil Nadu, India.

The town is also the centre for various industrial activities which includes Sathanur dam hydro-electric project,[5] Aavin milk processing plant[6] and Periya Kolappadi SIDCO estate.

Major towns like Arani, Polur, Thiruvannamalai, Singarapettai, Pudupalayam, Sathanur Dam, Thandarampattu and Uthangarai.

Frequent buses ply from Chengam to Salem, Dharmapuri, Bangalore, Hosur, Krishnagiri, Tirupattur, Vellore, Chennai, Polur, Uthangarai, Hogenakkal, Pondicherry, Thiruvannamalai, Kallakurichi, Vizhuppuram and Chidambaram.

Local town buses ply to Sathanur Dam, Kadaladi, Kanchi, Polur, Pudupalayam, Singarapettai, Neepathurai, Mel ravanthavadi, Thaazhaiyoothu, Thandarampattu, Pachal and many other villages.