| Name | Cemetery | County | Updated |
| COOPER, Florence | Yankton Municipal Cemetery | Yankton | 2015-08-15 03:40:13 |
| COOPER, Joseph C. | Sacred Heart Catholic Cemetery | Yankton | 2015-08-15 03:40:13 |
| COOPER, Theodore A. | Yankton Municipal Cemetery | Yankton | 2015-08-15 03:40:13 |