The Ōwani Line (大鰐線, Ōwani-sen) is a railway route operated by the Japanese private railway Kōnan Railway (弘南鉄道, Kōnan Tetsudō) in Aomori Prefecture, from Chūō-Hirosaki Station in Hirosaki to Ōwani Station in Ōwani.

On July 25, 1949, the Hirosaki Electric Railway (弘前電気鉄道株式会社, Hirosaki Denki-Tetsudō Kabushika-kaisha) was established, and connected Ōwani Station with Chuo-Hirosaki Station by January 26, 1952.

The company was founded by a combination of capital from the Hirosaki city government, and Mitsubishi Electric, with the line intended by Mitsubishi to be a test platform for future local train systems.

A new automatic block signal system became operational from November 1, 2003.

Station numbering was introduced on the Ōwani Line on October 5, 2020.