Thane District ([]) is a district in northern Maharashtra state in Western India. At the 2011 Census it was the most populated district in the nation, with 11,060,148 inhabitants; however, in 2014 the district was split into two with the creation of a new Palghar district, leaving the reduced Thane district with a 2011 Census population of 8,070,032. The headquarters of the district is the city of Thane. Other major cities in the district are Navi Mumbai, Kalyan-Dombivli, Mira-Bhayander, Bhiwandi, Ulhasnagar, Ambarnath, Badlapur, Murbad and Shahapur. This is the third-most industrialised district in Maharashtra.