Geoffrey Horsman Coles (13 March 1871 – 27 January 1916) was a British sport shooter who competed at the 1908 Summer Olympics.
In the 1908 Olympics, he won a bronze medal in the team pistol event and was 11th in the individual pistol event.
Coles was killed in action during the First World War, serving as a private with the Royal Fusiliers near Festubert. He was buried at Brown's Road Military Cemetery nearby.