Rajpur Sonarpur (Bengali: [ɾɑːd͡ʒpuɾ s̪oːn̪ɑːɾpuɾ]) is a city and a municipality of the South 24 Parganas district in the Indian state of West Bengal. It is a part of the area covered by the Kolkata Metropolitan Development Authority (KMDA). Rajpur and Sonarpur are two separate towns. Since the formation of the municipality, these twin towns are known together as Rajpur Sonarpur.