Su'ao Township (Chinese: 蘇澳鎭; pinyin: Sū'ào Zhèn; Wade–Giles: Su1-ao4 Chen4; Pe̍h-ōe-jī: So͘-ò), alternately romanized as Su-ao, is located in southern Yilan County, Taiwan, is an urban township that is famous for its seafood restaurants and cold springs. It is a terminus of National Highway No. 5, the Su'ao-Hualien Express Way, and the North-Link Line of the Taiwan Railway Administration. It also has two large harbors: Su'ao Port, a multi-function seaport that also houses a naval base; and Nanfang-ao Port, a major fishing port of Taiwan.