Kumarganj is a community development block that forms an administrative division in Balurghat subdivision of Dakshin Dinajpur district in the Indian state of West Bengal.

In 1947, the Radcliffe Line placed the Sadar and Thakurgaon subdivisions of Dinajpur district in East Pakistan.

In order to restore territorial links between northern and southern parts of West Bengal which had been snapped during the partition of Bengal, and on the recommendations of the States Reorganisation Commission a portion of the erstwhile Kishanganj subdivision comprising Goalpokhar, Islampur and Chopra thanas (police stations) and parts of Thakurganj thana, along with the adjacent parts of the erstwhile Gopalpur thana in Katihar subdivision were transferred from Purnea district in Bihar to West Bengal in 1956, and were formally incorporated into Raiganj subdivision in West Dinajpur.

The township of Kishanganj and its entire municipal boundary remained within Bihar.

Dakshin Dinajpur district is physiographically a part of the Barind Tract.

All rivers, flowing from north to south, overflow during the monsoons and cause floods.

[10] Approximately 252 km of the international border is in Dakshin Dinajpur district.

[15] As per 2011 Census of India, Kumarganj CD Block had a total population of 169,102, all of which were rural.

[19] The large scale migration of the East Bengali refugees (including tribals) started with the partition of Bengal in 1947.

The steady flow of people into Dakshin Dinajpur has continued over the years from erstwhile East Pakistan and subsequently from Bangladesh.

[16] See also – List of West Bengal districts ranked by literacy rate

These estimates were based on Central Sample data of NSS 55th round 1999-2000.

It includes factory, mining, plantation, transport and office workers, those engaged in business and commerce, teachers, entertainment artistes and so on.

204 villages (98.08%) have telephones (including landlines, public call offices and mobile phones).

The Tebhaga movement by the share croppers, towards the end of British rule, is widely known.

[31] Kumarganj CD Block had 192 fertiliser depots, 18 seed stores and 32 fair price shops in 2013-14.

The fund, created by the Government of India, is designed to redress regional imbalances in development.

[33][34] Kumarganj CD Block has 7 ferry services and 8 originating/ terminating bus routes.

Kumarganj CD Block had 331 institutions for special and non-formal education with 10,907 students.

[36][37] In 2014, Kumarganj CD Block had 1 rural hospital and 3 primary health centres with total 48 beds and 6 doctors (excluding private bodies).