| Jurisdiction: | Diocese |
| Wonju | |
| Latin: | Dioecesis Voniuensis |
| Local: | 원주교구 |
| Country: | South Korea |
| Territory: | Southern part of Gangwon |
| Province: | Seoul |
| Metropolitan: | Seoul |
| Area Km2: | 8,186 |
| Population: | 862,305 |
| Population As Of: | 2017 |
| Catholics: | 79,402 |
| Catholics Percent: | 9.0 |
| Parishes: | 53 |
| Denomination: | Catholic |
| Sui Iuris Church: | Latin Church |
| Rite: | Roman Rite |
| Established: | 22 March 1965 (years ago) |
| Cathedral: | Cathedral of Our Lady of Grace in Wonju |
| Bishop: | Basil Cho Kyu-man |
| Bishop Title: | Bishop |
| Metro Archbishop: | Andrew Yeom Soo-jung |
| Map: | Diocese of Wonju.svg |
The Catholic Diocese of Wonju (Latin: Dioecesis Voniuensis) is a diocese of the Latin Church of the Catholic Church in located in Wonju, South Korea. It is a suffragan to the Archdiocese of Seoul.
On 22 March 1965, Pope Paul VI established the Diocese of Wonju. Churches in Hoengseong, Pyeongchang, Jecheon and Danyang was transferred to Diocese of Wonju on 1 May 1969. The diocese lost territory later that year when the Diocese of Andong was established on 29 May 1969.[1] [2] The diocese acquired a 40 percent share of Wonju Munwha Broadcasting Corporation in 1970.