It is a rocky undulating area with laterite soil, with the Ajay on the north, the Damodar on the south and the Barakar on the west.

[2][3] Maithon Dam of Damodar Valley Corporation, located in Jharkhand, is on the border of this subdivision.

The census towns are: Chittaranjan, Hindustan Cables Town, Panuria, Domohani, Bhanowara, Majiara, Pangachhiya, Kunustara, Topsi, Nimsa, Chinchuria, Kenda, Parasia, Ratibati, Chapui, Jemari (J.K. Nagar Township), Banshra, Belebathan, Chelad, Murgathaul, Amkula, Baktarnagar, Egara, Sahebganj, Raghunathchak, Ballavpur and Kendra Khottamdi (partly).

[9] As per the 2011 Census of India data Asansol Sadar subdivision, after bifurcation of Bardhaman district in 2017, had a total population of 1,672,659.

In 1774, John Sumner and Suetonius Grant Heatly of the British East India Company found coal near Ethora, presently in Salanpur CD Block.

[20] Narayankuri ghat, on the Damodar, was used by Carr Tagore & Company for transporting coal to Kolkata by boat in the middle of the nineteenth century.

In order to capture the lucrative coal transport business, East Indian Railway laid lines up to Raniganj in 1855.

[22] The modernisation and expansion programme of IISCO Steel Plant, implemented with an investment of over Rs 16,000 crore, was dedicated to the nation by Narendra Modi, Prime Minister, on 10 May 2015.

Ltd. (earlier Bengal Paper Mill), after revamp of the plant at Ballavpur, started production in 2009.

[27] The following institutions are located in Asansol subdivision: 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 2014 in Paschim Bardhaman district, after bifurcation of Bardhaman district in 2017, with data for the year 2013–14.

The subdivision has block primary health centres at Pithaikuri, Kelejhora, Bahadurpur, Akalpur and Raniganj, and primary health centres at Dabar, Parbatpur, Domohani, Panuria, Nuni, Lalganj, Churulia, Chinchuria, Birkulti, Baktarnagar and Tirat.