大头鳕（学名：Gadus macrocephalus），又称为太平洋鳕，为辐鳍鱼纲鳕形目鳕科鳕属的鱼类。

分布于国外东北达朝鲜、白令海峡北部、阿拉斯加湾及美国洛杉矶海区.在日本自北海道南达本州岛西岸的山阴县及东岸的中部以及黄海约北纬32°30'及东经124°以北到渤海及鸭绿江口诸海域等，属于冷水性海鱼。其生存的海拔范围为-238至-15米。该物种的模式产地在白令海。 本鱼背鳍3个，臀鳍2个，下巴触须长，背部棕色或灰色，腹侧白色，背鳍软条37-57个;臀鳍软条31-42个，体长可达119公分。栖息在大陆棚、大陆坡，属肉食性，以鱼类、章鱼、甲壳类等为食，为高经济价值的食用鱼。

The Pacific cod, Gadus macrocephalus, is a species of ray-finned fish in the family Gadidae. It is a bottom-dwelling fish found in the northwestern Pacific Ocean, mainly on the continental shelf and upper slopes, to depths of about 900 m (3,000 ft). It can grow to a length of a meter or so and is found in large schools. It is an important commercial food species and is also known as gray cod or grey cod, and grayfish or greyfish. Fishing for this species is regulated with quotas being allotted for hook and line fishing, pots, and bottom trawls.