The girl, a class 10 student and a resident of Sonadanga village in the Ranitala police station area, had been missing since June 11, the police said.
Asked if it was a case of rape and murder as alleged by the residents of Sonadanga village, the police said it would be confirmed only after the post-mortem report was received.
West Bengal was recently rocked by a spate of incidents of torture against girls.
Still, another mutilated body of a girl was found yesterday by the police in jute fields at Gaighata in North 24-Parganas district.