One of the main objectives of the Disaster Risk Reduction in Greater Mumbai project of the Municipal Corporation of Greater Mumbai (MCGM) or Brihan Mumbai Municipal Corporation (BMC) is to build MCGM’s competency to manage disaster risks. The City Profile provides a background of geographical, environmental, institutional, social and economic setting of Greater Mumbai. This background is vital to understand the characteristics, strengths and vulnerabilities of the city. It is thus invaluable in understanding the factors that promote risks in view of the need to develop proactive disaster risk reduction practices for managing disaster risk in the city. Mumbai Metropolitan Region (MMR), established under The Mumbai Metropolitan Region Development Authority Act, 1974, treats Greater Mumbai with its rapidly growing hinterland as one region for development purposes. It covers an extensive area of about 4,355 km2 spanning four districts of Maharashtra state: Mumbai City (complete), Mumbai Suburban (complete), Thane (part) and Raigad (part).