Trivia: Paul Brickhill, who wrote the novel the film is based on, was a member of the X organization which planned the escape.
Trivia: In the scene following Hilts' theft of a German motorcyle, he rolls into a German town, where he is stopped by a police officer; the officer says something to Hilts, who then kicks him away and rides off. He was asked for identification papers he didn't have.
Trivia: Donald Pleasence was an RAF pilot and a genuine POW. His plane was shot down, and he was interned in a German camp. In an interview about The Great Escape he said that the film's producers weren't interested in hearing his suggestions about making the camp scenes more realistic, so "I simply learned to shut my mouth."
Trivia: The actual camp site, which can still be visited, is in Zagan, Poland, which was, during the war, part of the Greater Reich.