After transferring Rajarhat-Gopalpur Municipality and Rajarhat (Community development block) to Bidhannagar subdivision, Bidhannagar subdivision's total area becomes 141.37 km2 (54.58 sq mi), the population becomes 808,251 (2011 Census), and density becomes 5,700/km2 (15,000/sq mi).

North 24 Parganas district is densely populated, mainly because of the influx of refugees from East Pakistan (later Bangladesh).

An estimate in 2000 placed the total number of illegal Bangladeshi immigrants in India at 1.5 crore, with around 3 lakh entering every year.

[14] During the UPA government, Sriprakash Jaiswal, Union Minister of State for Home Affairs, had made a statement in Parliament on 14 July 2004, that there were 12 million illegal Bangladeshi infiltrators living in India, and West Bengal topped the list with 5.7 million Bangladeshis.

More recently, Kiren Rijiju, Minister of State for Home Affairs in the NDA government has put the figure at around 20 million.

[3][20] The data provided here is that of a period prior to the formation of Bidhannagar Municipal Corporation, and, as such, would require updating as and when such information is available.

North 24 Parganas district had a literacy rate of 84.06% (for population of 7 years and above) as per the census of India 2011.

The table below (all data in numbers) presents an overview of the medical facilities available and patients treated in the hospitals, health centres and sub-centres in 2013 in North 24 Parganas district.