The 2014 London Marathon was the 34th running of the annual marathon race in London, England, which took place on Sunday, 13 April. The men's elite race was won by Kenyan Wilson Kipsang Kiprotich and the women's race was won by Kenyan Edna Kiplagat. The men's wheelchair race was won by Switzerland's Marcel Hug and the women's wheelchair race was won by American Tatyana McFadden. Kipsang and McFadden set course records.

The London Marathon is an annual marathon held in London, England. It is the largest marathon in the world, with over 53,700 finishers in 2024, and 840,318 applicants for the 2025 event. Founded by athletes Chris Brasher and John Disley in 1981, it is typically held in April, although it moved to October for 2020, 2021, and 2022 due to the COVID-19 pandemic. The largely flat course is set around the River Thames, starting in Blackheath and finishing at The Mall. Hugh Brasher is the current race director and Nick Bitel its chief executive.