The district headquarters is located at Chengalpattu.

Chengalpattu District has 3 Revenue Divisions Taluks in the Tambaram and Chengalpattu Revenue Divisions lie in the Chennai Metropolitan Area.

Chengalpattu district has 16 district panchayat wards details of which are in [5] Chengalpattu district has 1 City Municipal Corporation Chengalpattu District has 4 Municipalities Chengalpattu District has only 1 Cantonment Board Chengalpattu District has 6 Town Panchayats details of which are in [5] Chengalpattu District has 8 Panchayat Unions Chengalpattu District has 359 Rural Village Panchayats.

[5] Mudichur, Vandalur, Urapakkam, Pozhichalur, Tirusulam, Cowl Bazaar, Medavakkam, Nanmangalam, Kovilambakkam, Agaramthen, Mappedu, Sithalapakkam, Kovilanchery, Ponmar, Mambakkam, Thalambur, Thimmavaram,Siruseri, Muttukadu, Singaperumal Koil, Paranur, Kodur, Koovathur, Nedumaram, Paiyanoor, Seekinankuppam, Veerabogam, Manamai, Padur, Kolatthur, Manampathy, Mullipakkam, Karumpakkam and Cheyyur.

[7] Chengalpattu District has 6 State Assembly Constituencies: Two State Assembly constituencies are partially from Chennai: