本區形狀似丁字型，東西最大跨距約 10 KM；南北最大跨距 8 KM，總面積約 58 KM2。位置喺臺中市西北端，北同苗栗縣苑裡鎮以南房裡溪同新復溝為界；南同清水區相隔大甲溪，西同大安區、臺灣海峽相鄰，東同外埔區相接。地形上喺苗栗丘陵南端；清水平原北面；后里臺地嘅西側。
THE AREA IS SHAPED LIKE A T-SHAPE, WITH A MAXIMUM SPAN OF ABOUT 10 KM FROM EAST TO WEST AND 8 KM FROM NORTH TO SOUTH, WITH A TOTAL AREA OF ABOUT 58 KM2. The location is at the northwest end of Taichung City, bounded by Fangli Creek and Xinfugou in the south and Yuanli Town of Miaoli County in the north; Dajiaxi in the south and Qingshui District, adjacent to Daan District and the Taiwan Strait in the west, and Waipu District in the east. Topographically, it is at the southern end of the Miaoli Hills, the north of the Qingshui Plain, and the west side of the Houli Plateau.