Lassan Nawab is a be valley about 32 kilometers from Mansehra. Lassan Nawab is a village and union council (an administrative subdivison) of Mansehra District in Khyber-Pakhtunkhwa province of Pakistan. It is located in the south of the district and borders Haripur and Abbottabad districts.
Formerly it was a part of Princely State of Amb.