The Diocese of Taichung () is a Latin Church diocese of the Catholic Church in Taiwan.
Originally erected as an Apostolic Prefecture of Taichung in 1950, the Prefecture was elevated to a full diocese in 1962. The diocese is a suffragan of the Archdiocese of Taipei.
The current bishop is Martin Su Yao-wen, appointed in June 2007.
Ordinaries
William Francis Kupfer, M.M. † (26 Jan 1951 Appointed – 25 Jun 1986 Retired) Joseph Wang Yu-jung † (25 Jun 1986 Appointed – 25 Jun 2007 Retired) Martin Su Yao-wen (25 Jun 2007 Appointed – present)