Toucheng stands guard over the northern terminus of the Lan-yang Plain, and has always been remembered as the place where the Chinese first settled in the local area. Tou-cheng ’ s Black Rock Harbor derived its name from the three big, dark rocks rising out of the water in the middle of the harbor.
「頭城」古名「頭圍」，以「一夫當關」之勢扼守著蘭陽平原，素有「開蘭第一城」之稱；城內的烏石港則是入蘭海道的咽喉，因港區內有 3 塊黑色大礁石而得名。