What is Chengalpattu district?
{{Infobox settlement | name = Chengalpattu District | population_density_km2 = auto | leader_title2 = [[Superintendent of Police]] | leader_name2 = E. Sundaravathanan, [[Indian Police Service|IPS]] and Mahesh Kumar Aggarwal, [[Indian Police Service|IPS]] | unit_pref = Metric | area_footnotes = <ref name=news7>{{cite AV media |title=செங்கல்பட்டு மாவட்டத்தின் பெருமைகளை சுட்டிக்காட்டி முதல்வர் பேச்சு! |language=Tamil |url=https://www.youtube.com/watch?v=AioOsBxBoHw |publisher=[[News7 Tamil]] |date=28 November 2019 |access-date=29 November 2019}}</ref> | area_rank = | area_total_km2 = 2,945 | elevation_footnotes = | elevation_m = | population_total = 2,556,423 | population_as_of = 2011 | population_rank = 8th | population_demonym = | leader_title1 = [[District Collector]] | population_footnotes = <ref name=news7 /> | demographics_type1 = Languages | demographics1_title1 = Official | demographics1_info1 = [[Tamil language|Tamil]] | timezone1 = [[Indian Standard Time|IST]] | utc_offset1 = +5:30 | postal_code_type = [[Postal Index Number|PIN]] | postal_code = 603XXX,600XXX | area_code_type = Telephone code | area_code = 044 | registration_plate = TN-19, TN-14, TN-22, TN-85 and TN-11 | website = {{URL|Chengalpattu.nic.in}} | leader_name1 = A.John Louis, [[Indian Administrative Service|IAS]] | governing_body = Chengalpattu District Collectorate | official_name = | subdivision_name1 = [[File:TamilNadu Logo.svg|22px]] [[Tamil Nadu]] | nickname = Chengai District | settlement_t