Kolkata, a megapolis having very high population density and large population living in extremely crowded and congested high rise building is located in a region of quite high seismic activity. Further as the area around Kolkata is situated on the east bank of river Hooghly at a small distance from Bay of Bengal, high tidal actions are also felt through the river over the area. As the landmark in the area has been developed by riverine deposition, the soil below the area exhibits large irregular variation in character both in horizontal and vertical direction. To safeguard the people and structures of the area there is urgent need to develop microzonation mapping of the area from the view point of liquefaction potential. With this view, soil mapping over a depth of 30 m from G.L. was undertaken and sectional profiles along N-S and E-W direction over the area were developed and presented in this paper