| Katherine Horny | |
| Full Name: | Katherine Xenia Horny Sebastiani |
| Nickname: | Kathy |
| Birth Date: | 11 November 1969 |
| Birth Place: | Lima, Peru |
| Height: | 1.86 m |
| Position: | Middle blocker |
| Teamnumber: | 1 |
| Nationalyears: | 1987–1988 |
Katherine Horny (born 11 November 1969) is a former volleyball player from Peru who played for the Peruvian women's national volleyball team. She won a silver medal at the 1988 Seoul Summer Olympics.[1] She was a middle blocker.[2]