The Cao'e River (Chinese: 曹娥江; pinyin: Cáo'é Jiāng) is one of the largest rivers in Zhejiang Province of East China, named after Cao E, a Han dynasty girl venerated for her filial piety.

Its source, Tengxi or Teng Creek (藤溪), is located in Wangcun Village, Shanghu Town, Pan'an County.

[2] The Chengtan River, the main source of Cao'e, is often considered a tributary.

It originates in Dongyang and joins the Cao'e River in downtown Shengzhou.

A major attraction is the Cao'e Temple, built in the Song dynasty (960–1279) to commemorate the filial daughter.

Other sights include the hometown of Zhu Yingtai and the hermitage of the renowned Eastern Jin Prime Minister Xie An.