| Mary Klass | |
| Full Name: | Mary Beatrice Klass |
| Nationality: | Singaporean |
| Birth Date: | 16 May 1935 |
| Sport: | Sprinting |
| Event: | 100 metres |
Mary Beatrice Klass (born 16 May 1935) is a Singaporean former sprinter. She competed in the women's 100 metres at the 1956 Summer Olympics.[1] Klass won a silver medal in the 100 metres at the 1954 Asian Games. She is a Eurasian of Dutch and Portuguese descent.[2] In 2016, Klass was inducted to the Singapore Women's Hall of Fame.[2]