| Sofie Castenschiold | |
| Country: | Denmark |
| Fullname: | Thora Gerda Sofie Castenschiold |
| Birth Date: | 1 February 1882 |
| Birth Place: | Copenhagen, Denmark |
| Death Place: | Helsingborg, Sweden |
| Medaltemplates-Expand: | yes |
Thora Gerda Sofie Castenschiold (1 February 1882 - 30 January 1979) was a Danish tennis player at the beginning of the 20th century.[1] She was the first woman to represent Denmark at the Olympics.[2]
Castenschiold, a member of Copenhagen's KB, won the title at the first Danish women's tennis championships in 1906. She could defend it four times in a row until 1910.[3]
She took part in the 1912 Summer Olympics at Stockholm and won the silver medal in the indoor singles competition.[4]