| Jurisdiction: | Diocese |
| Yanggu | |
| Latin: | Dioecesis Iamcuvensis |
| Country: | China |
| Metropolitan: | Jinan |
| Province: | Jinan |
| Rite: | Latin Rite |
| Cathedral: | Cathedral in Dingshui |
| Area Km2: | 3,244 |
| Population: | 1,430,000 |
| Population As Of: | 1960 |
| Catholics: | 10,237 |
| Catholics Percent: | 0.7 |
| Bishop: | Joseph Zhao Feng-chang |
| Metro Archbishop: | Joseph Zhang Xianwang |
The Roman Catholic Diocese of Yanggu/Yangku (la|Iamcuven(sis),) is a diocese located in Yanggu in the ecclesiastical province of Jinan, and is centered in the Chinese province of Shandong.