The Kelly–Hopkinsville encounter, also known as the Hopkinsville Goblins Case, and to a lesser extent the Kelly Green Men Case, is the name given to a series of presumably connected incidents of alleged close encounters (A CE-III) with supposed aliens. The incidents occurred in the fall of 1955, the most famous and well-publicized of which centered around a rural farmhouse at the time belonging to the Sutton family, which was located between the hamlet of Kelly and the small city of Hopkinsville, both in Christian County, Kentucky, United States. It is from these main incidents that the entire case takes its name.
Witnesses included not just the two families present at the farmhouse but also numerous other civilians, and even one encounter with allegedly the same creatures in another part of the United States along the Ohio River a week prior to the incidents in Kentucky, which itself had numerous witnesses. An incident in the United Kingdom occurred some two decades later also with allegedly the same creatures, amongst other alleged sightings of the creatures elsewhere.
However the events at Hopkinsville in Kentucky, 1955, are regarded the most significant of the case as witnesses there included policemen and state troopers, and were taken seriously enough as to be officially investigated by the United States Air Force. The Hopkinsville Goblins Case remains one of the most well-known and well-documented cases in the history of UFO incidents, and a favorite for study in UFOlogy.