Chennai the fourth largest metropolis in India. Chennai Metropolitan Area (CMA) extends over 1189 sq.km.and comprises of
20 Town Panchayats and
214 villages covered in 10 Panchayats Unions
It encompasses the Chennai District (176 sq.km.), part of Thiruvallur District (637 sq.km.) and a part of Kancheepuram District (376 sq.km.).