| Jurisdiction: | Diocese |
| Ningyuan | |
| Local: | Chinese: 天主教甯遠教區 Chinese: 天主教宁远教区 |
| Latin: | Dioecesis Nimiuenensis |
| Country: | China |
| Province: | Chongqing |
| Metropolitan: | Chongqing |
| Established: | August 12, 1910 |
| Denomination: | Roman Catholic |
| Sui Iuris Church: | Latin Church |
| Rite: | Roman Rite |
| Cathedral: | Cathedral of the Angels, Xichang |
| Area Km2: | 120,000 |
| Population: | 2,000,000 |
| Population As Of: | 1950 |
| Catholics: | 11,143 |
| Catholics Percent: | 0.6 |
| Bishop: | John Lei Jiapei |
| Metro Archbishop: | Sede vacante |
| Map: | Mission du Su-tchuen méridional.jpg |
The Roman Catholic Diocese of Ningyuan (la|Dioecesis Nimiuenensis; Chinese: t=天主教甯遠教區), also known as Diocese of Xichang or Sichang, is a Latin Catholic diocese located in the city of Xichang (formerly known as Ningyuan or Kienchang) in the ecclesiastical province of Chongqing in western China. It was established on August 12, 1910 as the Apostolic Vicariate of Kienchang for the Mission of Sichuan (Szechwan) in the province's Nosuland.
The Diocese of Ningyuan covers the cities of Xichang (French: Lin-yuen-fou) and Panzhihua, the counties of Dechang, Huidong, Huili (French: Houy-ly-tcheou), Mianning, Miyi, Yanyuan (French: Yen-yuen-hien), and some surrounding villages, totaling 120,000 square kilometers.[1] It is bordered by the Diocese of Kangding to the west and northwest, Diocese of Suifu to the east, Diocese of Jiading to the northeast, Diocese of Dali to the southwest, and Archdiocese of Kunming to the east and south.
One of the headquarters of the Spanish Redemptorist missions in Sichuan was based in the Apostolic Vicariate of Ningyuanfu.[2]