Geoffrey Lionel “Geoff” Iden (8 October 1914 – 12 January 1991) was a British middle- and long-distance runner who had his biggest successes in the marathon. He finished 9th in the 1952 Olympic Games marathon, where he was the first and only Briton to finish and ran a then personal best of 2 hours 30 minutes and 42 seconds, and sixth in the European Athletics Championships of 1954.