Rajpur Sonarpur 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. It,s most part falls under South 24 Parganas district,while a friction of it lies in Kolkata district

South 24 Parganas (Pron: pɔrɡɔnɔs; abbr. 24 PGS (S)), or sometimes South Twenty Four Parganas and Dakshin 24 Parganas, is a district in the Indian state of West Bengal, headquartered in Alipore. It is the largest district of West Bengal by area and second largest by population. It is the sixth most populous district in India (out of 640). On one side of the district there is the urban fringe of Kolkata, and on the other the remote riverine villages in the Sundarbans.