Halisahar is a city and a municipality of North 24 Parganas district in the Indian state of West Bengal. It is a part of the area covered by Kolkata Metropolitan Development Authority (KMDA).
Halisahar is believed to have existed from the early Middle Ages. It was earlier named Kumarhatta. It had also been the residence of Pachu Shakti Khan, the cavalry commander of Humayun. In the 13th century, during the reign of Baktiyar Khilji it was known as Haveli Shahar (City of Palaces). In the 16th century, Abul Fazal's Ain-i-Akbari mentioned it as 'Halisahar'. The municipality was established in 1903.