 Birnagar railway station is 81 kilometers north of Kolkata on the Sealdah railway division.As per the records Birnagar was an island in the Hoogly river that changed its course away of the then ULA around 1707 A.D. Before British colonization, Birnagar was called "Ula" or "Ulo".The "Ula" name is still present in the names of some local institutions, such as the library and hospital.