Krishna district is an administrative district in the Coastal Andhra region of the Indian state of Andhra Pradesh. Machilipatnam is the administrative headquarters and Vijayawada is the most populated city in the district. It has an area of 8,727 km² (3,370 sq mi) and had a population of 45,29,009 as per 2011 census of India. It is bounded by West Godavari on the east, Bay of Bengal on the South, Guntur and Suryapet districts in the west and a portion of it also borders with the state of Telangana. Krishna District is formed from District of Rajahmundry in 1859, Guntur district was separated from Krishna in 1904 to form Krishna district which was further divided in 1925, to Krishna and West Godavari districts.Krishna district is the most developed district in Andhra Pradesh.