| John Postans | |
| Birth Date: | 14 September 1869 |
| Birth Place: | Samford, Suffolk, England |
| Death Place: | Colchester, Essex, England |
| Sport: | Sports shooting |
| Show-Medals: | yes |
John Postans (14 September 1869 - 9 January 1958) was a British sport shooter. He was born in Suffolk. Competing for Great Britain, he won a gold medal in team trap shooting at the 1908 Summer Olympics in London.[1]