Harcourt Ommundsen (23 November 1878 – 19 September 1915) was a British sport shooter, who competed in the 1908 Summer Olympics and 1912 Summer Olympics. In the 1908 Olympics he won a silver medal in the team military rifle event. Four years later he won a silver medal in the team military rifle event and was seventh in the 600 metre free rifle event. Ommundsen was killed in action during the First World War, serving as a lieutenant with the Honourable Artillery Company near Ypres. He was buried at Brandhoek Military Cemetery nearby.