Line S1 of the Wenzhou Rail Transit (Chinese: 温州轨道交通S1线; pinyin: Wēnzhōu Guǐdào Jiāotōng S-Yī Xiàn)[3] is a suburban rapid transit line in Wenzhou running from Tongling to Shuang'ou Avenue.

The west section (Tongling - Olympic Center) has 12 stations[a] and is 34.38 km (21.36 mi).

The west section was opened on January 23, 2019.

[3] The east section of the line (19.127 km (11.885 mi)[4] with 6 stations) was opened on September 28, 2019.

The full line is 53.5 kilometres (33.2 mi) long.