| Jurisdiction: | Diocese |
| Hengzhou | |
| Local: | 天主教衡州教区 |
| Latin: | Dioecesis Hemceuvensis |
| Country: |  China |
| Metropolitan: | Changsha |
| Province: | Changsha |
| Rite: | Latin Rite |
| Denomination: | Roman Catholic |
| Area Km2: | 30,000 |
| Population: | 3,000,000 |
| Population As Of: | 1950 |
| Catholics: | 12,085 |
| Catholics Percent: | 0.4 |
| Bishop: | Sede Vacante |
| Apostolic Admin: | Methodius Qu Ailin |
The Roman Catholic Diocese of Hengzhou/Hengchow/Hengyang (Latin: Hemceuven(sis),) is a diocese located in the city of Hengyang (Hunan) in the ecclesiastical province of Changsha in China.