The port area extends from the south bank of Tachia River to the north bank of Tatu River, with a harbor boulevard on the east side and the Taiwan Straits to the westward. The total area is about 3,970 hectares (9,925 acres).
港區範圍北起大甲溪南岸、南到大肚溪北岸，東迄臨海大道，西面台灣海峽，面積共約三千九百七十餘公頃。