海雀科（学名Alcidae），是鸟纲鸻形目中的一个科。

它们的外表类似企鹅目，但这是趋同进化的结果，其实更接近于鸥类。和企鹅一样，海雀会游泳并潜水。但是，除已灭绝的大海雀之外，所有的海雀都会飞。

An auk is a bird of the family Alcidae in the order Charadriiformes. Extant auks range in size from the least auklet, at 85 g (3 oz) and 15 cm (5.9 in), to the thick-billed murre, at 1 kg (2.2 lb) and 45 cm (18 in). They are good swimmers and divers, but their walking appears clumsy. Modern auks can fly (except for the extinct great auk). Due to their short wings, auks have to flap their wings very quickly in order to fly.