| Jurisdiction: | Diocese |
| Xinyang | |
| Border: | Catholic |
| Country: | China |
| Metropolitan: | Kaifeng |
| Province: | Kaifeng |
| Denomination: | Catholic Church |
| Sui Iuris Church: | Latin Church |
| Rite: | Latin Rite |
| Area Km2: | 30,000 |
| Population: | 6,000,000 |
| Population As Of: | 1950 |
| Catholics: | 13,654 |
| Catholics Percent: | 0.2 |
| Bishop: | sede vacante |
| Metro Archbishop: | Joseph Gao Hongxiao |
The Diocese of Xinyang (also known as Sinyang; la|Siniamen(sis),) is a diocese located in the city of Xinyang in the ecclesiastical province of Kaifeng in China.