| Karl Laas | |
| Nationality: | Danish |
| Sport: | Long-distance running |
| Event: | Marathon |
| Birth Date: | 17 April 1908 |
| Birth Place: | Dorpat, Governorate of Livonia, Russian Empire |
| Death Place: | Tallinn, Estonia |
Karl Laas (17 April 1908 - 28 December 1967) was an Estonian long-distance runner. He competed in the marathon at the 1928 Summer Olympics.[1]