| Kay Long | |
| Full Name: | Marian Katherine Rosalie Long |
| Sport: | Athletics |
| Event: | Javelin throw |
| Birth Date: | 24 September 1920 |
| Birth Place: | Kingston upon Thames, England |
| Death Place: | Southampton, England |
Kay Long (24 September 1920 – 27 December 2007) was a British athlete who competed in the women's javelin throw at the 1948 Summer Olympics.[1]