Kalimpong district is a district in the state of West Bengal, India. Originally known as Dalingkot tehsil, the region was alternatively under the control of Sikkim and Bhutan. In 1865, it was annexed from Bhutan by British India under the Treaty of Sinchula, and administered as a subdivision of the Darjeeling district from 1916 to 2017. In 2017, it was carved out as a separate district to become the 21st district of West Bengal. The district is headquartered at Kalimpong, which grew to prominence as a market town for Indo-Tibetan trade during the British period. It is bounded by Pakyong district of Sikkim in the north, Bhutan in the east, Darjeeling district in the west, and Jalpaiguri district in the south. The district consists of the Kalimpong Municipality and three community development blocks: Kalimpong I, Kalimpong II and Gorubathan. From Wikipedia