Rajpur Sonarpur (Bengali: [ɾɑːd͡ʒpuɾ soːnɑːɾpuɾ]) is a city and a municipality of South 24 Parganas district in the Indian state of West Bengal.

[3] Many janapadas grew up along the old Bhagirathi channel from the ancient times till around the 16th century: Kalighat, Boral, Rajpur, Harinavi, Mahinagar, Baruipur, Baharu, Jaynagar Majilpur, Chhatrabhog etc.

"Chand Sadagar, a merchant character of the Manasavijaya, reached Baruipur, from Kalighat, through the old Bhagirathi channel.

Rama Chandra Khan, the zamindar of Chhatrabhog, helped Chaitanyadeva to continue with his journey.

The proximity to Kolkata's southern district and being on the banks of Adi Ganga, which is just across the river made the place to be well connected.

The entire district is situated in the Ganges Delta and the northern part of the subdivision is a flat plain bordering the metropolis of Kolkata.

[11] Petua, Panchghara, Mallikpur and Hariharpur form a cluster of census towns in the Baruipur CD block, as per the map of the Baruipur CD block in the District Census Handbook 2011 for the South 24 Parganas district.

It had a population density of 8,615 inhabitants per square kilometre (22,310/sq mi) with a sex ratio of 970 females for every 1000 males.

Rajpur Sonarpur had a total of 106,604 households as per report released by 2011 Census of India.

[17] According to the 2011 Census of India, 89.34% of the population is Hindu, 9.25% Muslim, 0.40% Christian, 0.10% Sikh, 0.04% Buddhist and 0.02% Jain.

After the partition of India, refugees from erstwhile East Pakistan and Bangladesh had a strong impact on the development of urban areas in the periphery of Kolkata.