Lambert II, Count of Lens (died 1054) was a French nobleman.

He was the son of Eustace I, Count of Bologne and of Maud de Leuven (daughter of Lambert I of Leuven). He married Adelaide of Normandy, Countess of Aumale, daughter of Robert I, Duke of Normandy. Lambert was killed at the Battle of Lille. He had a daughter, Judith of Lens and two sons, Seier of Lens and Walter of Lens.