Chennai district, which is also and formerly known as Madras district or "Madarasapattinam", is a district in the state of Tamil Nadu. It is the smallest of all the districts in the state, but has the highest human density. The district is a city district, which means that it does not have a district headquarters.
Cuddalore District is one of the districts of Tamil Nadu. The city of Cuddalore is the district headquarters.
Kanchipuram district is a district in the northeast of the state of Tamil Nadu. Kanchipuram is considered a district. It is bounded in the west by Vellore District and Thiruvannamalai District, in the north by Tiruvallur District and Chennai District, in the south by Viluppuram District and in the east by the Bay of Bengal. Kanchipuram district has a total geographical area of 4,432 sq miles and coastline of 57 km.
Tiruvallur district is an administrative district in the South Indian state of Tamil Nadu. It is a part of Greater Chennai Corporation. The town of Tiruvallur is the district headquarters.
Tiruvannamalai District is one of the 32 districts in the state of Tamil Nadu. It was formed in the year 1989 from non-existing North Arcot District as Tiruvannamalai Sambuvarayar and Vellore Ambedkar.
Vellore district is one of the 32 districts in Tamil Nadu. It is one of the six districts that form Tiruvannamalai region of Tamil Nadu. It is one of the biggest districts in Tamil Nadu.
Viluppuram District is one of the thirty-two districts of Tamil Nadu. The district headquarters is located at Viluppuram. Viluppuram district came into existence on 30th September 1993 when it was created out of South Arcot District. Viluppuram is the largest district in the state.